Apparently videos can be moved from one channel to another

https://preview.redd.it/fyho074wxu8e1.png?width=1332&format=png&auto=webp&s=4a5a17d52715118ecaac61a39b6c426b57a62048

I've never seen anything like this before. The original video was on the Rooster Teeth channel I believe, especially considering it's a 12 year old video on a 1 year old channel but I didn't think it was even possible in YouTube's architecture to move one video from one account to the other, is this a one off phenomenon or are there more? let me know!