This is a live demo of a Gameboy rendering video with the original (+audio) as reference. Sadly I lost the source code together with my harddrive a while ago. :( I planned to try and get the code to also create the audio track, but I ran into space limitations (the video itself didn't fit in a normal sized ROM) - I could only fit half the video data into memory.
The original footage can be found on my channel (uploaded some years ago) - I show that the ROM is booting from an EverDrive (check out krikzz.com 👍).
There are some apparent issues, the encoding I used produced some very bad artifacts and as can be seen in the footage, the video is not running with a stable framerate. I actually also had to speed up the video track in post editing by around 50% to make it fit the actual video. I think I had resampled the video's framerate to something around 15 frames per second because there was no way to update VRAM fast enough without some sophisticated algorithm.