Alright, I watch’s shout vid and although Tim not an expert at montages for shooters, I’ll do my best!
Thumbnail: it’s actually pretty darn good, I would only see add a little text to the thumbnails as there’s empty space that can sometimes turn off the viewer from clicking on the vid.
Video: The intro didn’t seem really necessary after the intro what you had there was better than the intro itself. Also be careful to not over edit some things because there are a couple moments where it’s a little too too crazy. But you can take this with a grain of salt since I’m not an expert towards this.