How to make a video
How to make a video
- Hello, this is Sal from the Khan Academy. And this is going to be a simple video on how I made videos.
- So first, just the equipment set up, I have a Wacom tablet right over here,
- and this is the tools for tablet; I think this is like $200 or $300
- if you can get a basic Bamboo tablet for like $80. It does the same thing as you pay more money;
- you just get more writing surface area right over here. It functions as a mouse
- with more importantly, you get a pen with it. Looks comfortably with the tablet and
- you can use that to actually write.
- I just have a completely standard -- actually it's below standard PC right over here.
- It was like the state of the art PC in 2008. And this art program that I have right over here is the SmoothDraw 3.
- This is freeware; you can use any art program you want to.
- I just like to use SmoothDraw 'cause it's lightweight; I don't have the most powerful computer in the world
- so it keeps the computer from freezing up and all that some of fancy art programs
- and all the fancy stuff they do in the background. SmoothDraw 3 is kind of bare bones,
- but at least you want it to be -- I really bare bones or maybe just want a bunch of more powerful computer,
- but the minimum if you want is the ability to be pressure sensitive.
- So, we -- let us draw three here. See while I'm writing I can write really lightly or I can write really dark,
- and so you can -- it looks a little bit more interesting, I should've taken the felted pen right over here;
- I just use the little paintbrush thing. You could use whatever you want.
- I put it in brush size 6 in some sort of pastel colors right over here,
- and you can see you can write really lightly or you can write really dark,
- you can shade things in, and the reason why I like why it's important for something to be pressure-sensitive
- is when you write with it, so "this is test writing" right over here, it looks --
- it doesn't look like just computer writing; it looks at least pretty close to like actual,
- like it looks like a digital, felted pen of some kind.
- So all I've done so far is I have his little pen tablet; I'm able to draw on this,
- and this isn't too different than what most kind of designer or artists would do in order to do some kind of graphic design,
- but I haven't showed you how to actually make a video.
- The actual video production is having screen capture software;
- I use Camtasia Recorder which comes with Camtasia Studio,
- and I think it costs like $200 or $300 for that.
- I believe there's other screen capture software including some free ones.
- They all have different positives and negatives; you can test them out,
- with Camtasia, so I'll just Camtasia Recorder here,
- and so you see is going to capture everything it sees at this portion of this screen,
- and I set it up as a 1280 by 720 dimensions,
- and so when I make the video I just going to capture this part here
- and that's why when you see a Khan Academy video, you don't see all this other stuff right over here.
- And so if I press record, it's going to start capturing everything that happens on the screen here,
- and it's going to capture my voice as captured by this microphone.
- Now the first like thousand kind of Khan Academy videos I did,
- I used literally like a $20 Logitech USB microphone, and actually the sound is pretty decent.
- And we now operated -- I think this is a Sampson microphone right over here; it's about $200.
- What I found is that there's not a general -- you know, I tried some $30 microphones that work out just great,
- and some $200 microphones or even $300 microphones that didn't work out just so well and had a buzzing noise or what ever,
- this one seems to work well for me; both the Wacom tablet and the Sampson microphone,
- they're just both USB devices you just plug them in,
- and so it will see is when I start recording this video,
- so I'll press record right over here on the Camtasia, and I'm just going to start making a video,
- and you'll see it captures everything it records on the video,
- so let me just show you test mode -- let me clear this first --
- so let's say -- so let me justify a little bit, I press record, it'll give me a little bit of a countdown --
- I'll like to test my pen off the screen right here (the side of the recording region),
- and so now it's actually recording everything that I'm saying is part of this video,
- so this is a video, 3 plus 5 is equal to 8. And I can change colors, I can underline 3 in orange,
- I can underline the 5 in -- well, that's orange again -- let's say in purple, whatever I want,
- I'm just changing. I tend to like these kind of pastel colors and the feel of the pastel chalk on top of the chalkboard,
- And you'll see when I'm done recording this video, the video got produced.
- And I can actually play the video -- my pen off the screen right here (the side of the recording region) -- so that's not me talking!
- That's the video talking! And so now it's actually recording everything that I'm saying is part of this video,
- so this is a video, 3 plus 5 is equal to 8. And I can change colors, I can underline 3 in orange --
- and once if you're happy with it, if you can just literally click save, it'll offer you to the edited Camtasia Studio and all that,
- but I just save it as an AVI file, and when it's saved as an AVI file, you can actually upload directly to YouTube if you want,
- or you can make a process in it and edit if you want to. I tend to not process or edit the videos unless if I made some error and I can fix that very easily,
- and yeah, so you just save it and you upload it. That's the technical part of making a video,
- and hopefully, that's not too difficult if you already have a PC it's literally talking about a couple $100 of equipment and software --
- and actually you can probably get the software for free, share your software whatever else, now about the subjective parts about making a video.
- For me, personally, it might vary from everyone who does videos, I'm a big believer -- and we got some feedback from our user based effect,
- they like the conversational nature of the video, the videos are literally exactly in the way I'm talking right now,
- and so for me, the way I prepare the videos is I read up a lot of --
- if I'm doing something -- if I'm doing algebra worked examples that doesn't require a lot of preparation;
- I can kind of work through the problem in real time.
- But if I'm doing -- say, history video, I'll read a bunch of stuff,
- I'll look for a bunch of public domain documents and maps and pictures on the web,
- and what's about the art program is you can copy and paste things on to this.
- And let me show you -- let's say I'm doing a -- so let me bring out a web browser,
- and as you can see, this computer is not state of the art.
- But let's say I wanted a map of Europe -- I'm actually am doing videos on World War I right now,
- and so I'll do a search for Europe 1914, and I'll also search on the word "public domain" just to make sure I'm getting a map that I can use.
- So I'll do a search for that, and I'll do a search for images, and most of these are Wikimedia Commons,
- this is Europe at the beginning of World War I, I can go to that page and I can verify --
- I can look at the licensing and I can verify right over here that this is a public domain map,
- so I can literally take this map -- I can copy the image, I can paste it right over here on to my art program --
- so let me change the pen. On to my art program, and now if I want to talk about World War I
- I can start recording, I can get my screen thing up, screen capture, and I can talk about -- I can mark up this map.
- I can say, "Look, Germany had to fight two fronts in World War I and the western front right over here and the eastern front right over here which was huge,
- because each front was huge, you couldn't do trench warfare so there's a much more fluid front."
- As you can see, you can start taking things off the web that you have the rights to or that applicable licensing terms associated with them, and also mark them up.
- So once you get the technical stuff down, my advice is, "Try to do as much preparation and as much reading as possible to
- steal the thoughts in your own brain; if it helps to, take notes, write your notes out multiple, multiple times,
- and then try to make the video. When you make the video,
- I often erred on the side of doing these long videos; I don't think that's a good idea, the shorter the videos, the better.
- I think the optimal is about 3 or 4 minutes; It will minimize the chance of making a mistake and will allow you to be more natural
- because you won't be stressed about all the things you actually have to talk about.
- And focus on the underline intuition on things. I think that's what people really crave;
- they don't want just get some superficial formulas or superficial facts; they want to get deep thing.
- They want to understand it as your brain understands it; that's why I not a big fan of the other scripted videos.
- Often times you can tell when someone's reading versus what they're thinking,
- and so I think people will appreciate if they see, 'Why, you're thinking through this;
- you're actually reasoning through why you couldn't have trench warfare on the eastern front or
- why completing the square actually gets you a quadratic formula.' I think you're told,
- 'Everyone has different styles of tones, but as natural as possible, let yourself be free as possible.'
- I actually force myself to smile often before the videos, it'll actually change your mood and you guys are, 'Ha, ha, ha!'
- Laugh at the videos if you can, whatever whenever you can,
- and the one thing I also found is this is very easy to freeze up, to press record,
- and what I often do is I delude myself. I can miss myself, 'Okay, Sal, don't worry about the next video,
- just do the practice round.' And when you do a practice round, it'll actually make you a lot less stressed when you just do the video,
- and then when you're done with it, at like 7 or 8 minutes later, I'm like,
- 'Hey, that wasn't so bad.' And you're probably going to be more critical of yourself than you need to be,
- and we all are, upload it or show it to some friends,
- and I think they're going to find all those things that you thought when you said, 'Um' that one time,
- I mean, you should try not say um if you can.
- But what you stuttered at one time, you made that you went back and fix that one mistake.
- You'll find that people don't mind as much as you thought, and sometimes I actually thought it was a positive thing for the video."
- So with that, let you go, I look forward to seeing the type of videos that I'll produce.
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At 5:31, how is the moon large enough to block the sun? Isn't the sun way larger?
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When naming a variable, it is okay to use most letters, but some are reserved, like 'e', which represents the value 2.7831...
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This is great, I finally understand quadratic functions!
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At 2:33, Sal said "single bonds" but meant "covalent bonds."
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