about deleted yt videos

I don't really know where else to ask this, but I was writing a story on someone's gameplay of Heartgold, and they didn't just unlist their videos but completely deleted them. I only know this because I have the link to the playlist and it's not available, which should still be up if they were only unlisted.
it's disrespectful, and there is no way to contact them... I choose an unpopular video as well, but should I hold out hope that there is some way of finding those videos.
for now I'm thinking of writing what I have over the summer and either sourcing out another video series OR converting the story that would be a complete original.