Not sure how much it would matter but the main difference I see is that if I upload my own code to GitHub I have the ability to give away the IP, but if I upload Avengers End Game to YouTube I don't have the right to give that away.
I wonder how it would work if we consider you flagged your code as GPL before it hits Github.
We could end up in the same situation as the Hollywood movie even if you are also the one setting the original license on the work. Basically you have a right to change the license, but it doesn’t mean you do.
