I'm old school from 56k modem days. I have a habit of saving everything. Never count on a remote file being there tomorrow. It was a over two years ago, but I ran youtube-dl on your channel playlist and saved everything to 360p.
It was majority of the videos (up to 324). When it downloaded them, it also saved the comments. I don't know if you have them or not, but just in case you don't, here is an archive of the one's I have.

​

Later On!

- Jay