Except that's how it's going to be applied. Use the word react in your youtube title, tags, or description and it'll be yanked! (or FineBros will take your ad money) I understand the business necessity to trademark your work(s), but in the context of youtube, it's merely a means to bully everyone. Even if that's not their intent, it's going to be very hard not to.
Ask Devinsupertramp how that works.