According to that video's description, he wrote the software/script himself. I guess it wouldn't hurt to ask though.

Have you asked the authors of those videos what they use?

Turns out that after effects does a pretty good job. Probably will just use that.

That's my plan. My only problem is that all the programs I find are either ugly or only update at 5fps.

In that case, any oscilloscope software (or hardware) will fit the bill. Just record a video of each channel of audio being played through the scope and throw them together in your video editing software.

That's a neat program, but not quite what I'm looking for. Although maybe having a piano roll would work. I'm just looking for something interesting to put on screen.
I'm using a game boy. I was just planning on playing each track separately and feeding each into a program, recording it, then putting it all together.

It might depend on what chip you're using (NES vs. Atari, etc.), what the software can extract... I don't know of any oscilloscopes, but I have seen NSFplug used as a background for Youtube videos (for NES chiptunes, of course). No waveforms, but it shows note values, velocities, a piano roll, and stuff like that.

Example: https://www.youtube.com/watch?v=5uKhgzXYj7Y

I'm thinking about creating a youtube channel for my music, but I want to make it more interesting to watch than just a static image of album art. (Even if most people will just have it playing in the background) I was thinking I could record an oscilloscope playing each channel of my music separately and put the waveforms next to each other in a video. Basically this with my own music.

I've been looking around for some software, but everything I've been finding is super old, and only updates at around 10fps. Ideally I would like 60. Anyone know of such a program?