pretty fun

Not sure it takes that much efforts:
1. find the midi or kar version of the song
2. open it in a SID / 8bit sound chip emulator (I have one, somewhere, from 15 years ago...you can even choose which computer sounds you want to emulate)
3. record and upload on youtube
Now, my ear & my production knowledge are not accurate enough to see if they made the extra effort to clean the mix etc.