There are bet for youtubers trying to do boxing but it is different to always call it real bet since most at times what they do is staged and performed. Youtubers do what they can to gain views and streams since they are monetized, everything surrounding their actions can be staged including the beef most times.
It will be considered a public stunt, betting on the event should be dealt with caution, people hype on their favorite youtuber not who seems to have the upper hand in the match.