Ooof, it's definitely not just you. I definitely root for Mozilla to succeed and think they're critical in the grand scheme of the browser wars, but that video is rough. It's practically Cocomelon.
I wish the best for Mozilla.
Donate to Ladybird!
They're trying to regain mass market appeal because the only people using it now are diehard nerds, the video isn't for you
I thought it looked good, it feels polished, their mascot looks cool, and I like it when open source gives two shits about design.