The quality is good, but if I put my Art Director Business hat on:
I don't think the messaging is focused enough. The video is too busy and hard to connect with.
The music is good, but not sure if it fits. I didn't get a sense of genre from it. And it's a little intense. The music should draw the viewer in just like a good opening line or paragraph.
I'd go with way bigger text, fewer words - more tag line-ish - and larger images that fill the screen. Check out film scores for movies in your genre to get a sense of what audiences expect.
And I'd promote one book at a time. Maybe 10-15 seconds?
The reason for the one book thing is to hyper-focus your messaging, similar to the single lane argument from a few months back. Also, by splitting up the books you're creating synergy by having more spots to run.
Most videos these days are pretty pro, so we have to go above and beyond concept-wise to stand out and get attention/engagement.
