I'm trying to reach other YouTube users that might enjoy watching my show. It's a weekly comedy show about the UFC. So, I've been watching videos related to the UFC to find people who might be interested in my show.
If I send personal messages to all of the users who comment on UFC videos telling them about my YouTube channel, is that considered spamming? If so, can sending a large amount of personal messages and being marked as spam by those users get me banned or in trouble with YouTube?