Summer of Math Exposition

Nice video! My biggest takeaway was that by using the Two’s Complement system, there’s no need to implement subtraction, which intuitively will simplify the process of computer arithmetic. Thanks for the lesson!

It’s an interesting choice to explain the concept of binary in a video about two’s complement. If the video is for CS undergrads or math enthusiasts, then they probably know how binary works. If it’s for a more general audience, then not many of those people will be interested in a 30 min video on this topic.

That being said, the explanations were very clear, and it definitely made me understand two’s complement better, even as someone with a CS background. However, my main critique is that the video is SO SLOW. Maybe I’m biased because I’m already familiar with the subject, but I think you could probably keep the same script and make this a 20 min video, just by tightening up the narration and the whiteboard animations.

I particularly enjoyed the example of representing decimal numbers in the same style as two’s complement, it really helped clarify what’s going on in the binary case, and why arithmetic is so convenient.

Not super novel but a very solid introduction to binary and two’s complement. I’d expect most students to understand the topic super well from this video. It’s great that you covered things by going through different ideas and looking at the pros and cons. Not that it hasn’t been done before but this is still among the best videos covering the topic I’ve seen!

I think it’s good to have more explanations of two’s complement, I think you found some interesting ideas on how to do it, but you get to the idea of what a negative number even should be a bit late in my opinion, with the “consistent arithmetic” idea. Still, good overall

This is a good explanation of the two complement encoding of negative numbers. I would have benefited from it during my own study.

Very good introduction to bit arithmetic and relating it to the base ten of everyday use.

Since you go so far as to remind students how binary works, it might be good to remind at the same time how adding or substracting works in binary. You do it at the end of the video, but by that point you already mentioned that arithmetic works weirdly with just a signed bit, and students would be confused at that point about how arithmetic can even work. Picking example values that are a bit smaller (around the 30 minute mark) might be easier. It would be also an interesting opening to mention that there are other ways to store numbers (floats, integers of bigger size, etc etc) since students aware of types might have questions about it. Outside of these small remarks, this is a great video! Going back to the decimal case and showing how it would translate makes things more clear.

Very understandable video with quite nice animations. I think the only thing missing is a bit of music in background and a bit more visualisation in some parts. Also it’s quite long, but still pretty easy to follow. Hh

I’m five minutes into this video and my first thought is that the content is pretty basic and it moves very slowly. If the target audience is undergraduate students, I think they will be bored at this point.

In theory, I like the concept of overlaying the human writing on top of the video, but in this case the writing was sloppy and not easy to read, so it was actually a distraction.

On the positive side, I thought the graphics were good overall, and I do appreciate the fact that the creator didn’t move too fast, a common mistake with videos. However, I still feel the video move too slowly for the level of content being discussed. If the content was much more challenging, the pacing might have been fine, but for materials that is relatively easy the pacing could be faster.

Another thing the creator should think about in future videos is to try to create some kind of variety in the video. Basically, every scene in this video is very similar to every other scene, and when this goes on for over 30 minutes, you run the risk of losing your audience’s attention.