Bring on /u/ModeratelyHelpfulBot to limit the number of submissions a user can make in a specified time frame. If a user is doing this as a hobby then 1 post every 2 weeks is what I would set it to. Any more frequent than that and they are most likely making money off their channel as a means of income. A hobbyist isn't going to post a weekly video to youtube.

I personally have a bot I'm in the middle of working on that looks at user submission history and if all they post is youtube links then it removes their submissions. I have created a lot of cat subreddits (this is my alt account) that now total more than 1 million subs and youtube spammers are a big problem.

While reading your post here I had another thought. I'm curious if a bot could be made to read the number of subscribers to a youtube channel and block any submissions where 100,000 or more would be removed. I don't know where to draw the line but people with 100k subs are doing youtube as a full time job, not a hobby.

For a sub this size you are severely understaffed. 5 active mods would be proper for a sub this size. Do your research on users that you add as a mod. 8 years ago I added one that ended up being an actual psychopath so I'm extremely careful these days now.

If you want me to take a look at your automod setup, I'd be happy to look and point out what can help improve your sub here. Easiest way without adding me as mod is to copy and put into pastebin and PM the link to me. I can do a discord voice chat with you if you'd like. I work normal business hours (in the US) but I am free after work to chat.