it's possible to set up a video background header on blog page?

Hi,
I’m trying to achieve something but can’t find how so I’m wondering it’s possible with that theme.

The point is to build a homepage which is the main blog page and has a video background on header (instead the featured post) + all the posts below but I’m finding those difficulties:

. The page has always the tagline on top unless it’s the homepage.
. If I set that page as homepage and create the header with visual composer then I’m not able to add the posts below
. Obviously I can’t set up this page as home + post page

Is there any way to achieve that? I would really appreciate if you can help on that, thanks a lot!

My Best!
Ivan