Response to original post:

This is the tutorial I linked on the github page: https://www.geeksforgeeks.org/how-to-install-ffmpeg-on-windows/
Which points to this download link: https://www.gyan.dev/ffmpeg/builds/ffmpeg-git-full.7z
Which I think is pretty legit as ffmpeg's website links to it.


Response to Edits:

They should work being where they were when it was downloaded, I don't know why you needed two copies. Perhaps I should rework how it finds rabbitsign and the key, seems to be a common problem.

Yeah it seems like the Github version is broken or at least the latest release is, or I downloaded the wrong file, because Gyan worked now. It seems to sound slightly better on-calc than my PC which is pretty cool. My adapter is damaged but if I hold it I can clearly hear the music very well.

EDIT: https://cdn.discordapp.com/attachments/466808269789200387/1063579319651283014/BITREKT.8xk

This is a song I made last Summer but only a small portion of it. With my speakers and subwoofer the bass is insane lol.

EDIT 2:

Works quite well, awesome!

And just out of curiosity, is it possible to download more than one video onto the calculator?

That depends on the size of the videod and thd calculator you have. If your calculator contaims "Silver Edition", then you can store more videos, as well as longer ones. If you have a regular TI-84 Plus, like I do, then you are more limited in terms of storage space.

I would personally stick to 1 video if I can help it, but you can definitely downlosd multiple (short) videos onto your calculator.