No matter how you shoot your videos, horizontally or vertically WordPress team will take care of it and rotate it according to your device, so that when you publish the video it looks great.
If you have VideoPress on your WordPress.com account then start right away and if you don't have one then head on over to VideoPress.com.
Duotone Theme: Now Video-Friendly
Duotone a very popular theme among photoblogger and if you are a photoblogger then you'll be familiar with it. This theme changes color according to the first image on every page and every post. The good news is that this theme now support VideoPress, so you can now publish videos with photos on your blog and engage your visitors with photos and videos.
Happy Blogging.