[Baliw]

I haven't seen her channel, but she speaks of 'building a brand'. She's obviously either making a living or attempting to make a living off her content.

It's not an over-reaction at all on her part. If you spent thousands of hours building a business and then destroyed all your efforts, you'd be pretty pissed too. And it's not enough to just have backups of the content. She had a following. It's way more time consuming to create a following than to create the content.