Looks pretty good. Not really a fan of the video intro, even though it's a little bit different it's still very similar to all those free After Effects ones out there. I'd suggest perhaps making something pretty short and original. Think of it as the first sentence of a book, need to 'hook' your viewers just like you would readers.
The banner for the channel is pretty decent. I feel it's a little too dark on the left side though, with the missing hexagon mesh it's sort of unsymmetrical/uneven brightness wise.