Parallax section image, mobile version and video gallery

Hello mates! Requesting some support, my previous post was abandoned, so i made another one.

My site is:
Fond of your theme, so switched my site to it. But have a list of problems i can’t resolve myself. I rely on your kindness and looking for some help:

  1. I would like to place continiously playing video in the header instead of parallax image and to place my logo here. How can i achieve this?
  2. I have a small parallax section with a text. I know that it’s quite hard to read white letter on a bright background but the problem is not about it. In PC version everything is great but in mobive version the sentences cross each other so it’s impossible to read anything. Tried to use <br> and codes to increase the break, but nothing helps
  3. How can i input the video in the widget? I mean i would like to make simply embed video from vimeo to make a video portfolio (not a specially designed gallery or smth). Is it possible to achieve it without any plugin? The possible example is in the link.
  4. I was trying to make something like pricing tables. Had that previously using another theme. My site is about wedding photography and videography, so i would like to display pricelist to the customers. Tried to use some plugins i used before (pricing table by supsystic) – its not working.
  5. Is it possible to switch site language to the Russian? I mean when you click the search button in the top menu you get english words like “type” and “search” as well as results of search. It’s not a big deal but still would apreciate your help with this issue.
  6. I have portfolio section with some photos here. The problem is i would like to make a gallery carousel when you click the photo to display it in full-width mode and switch from one to another easily. Now it’s linked to the post.
    And i would like to remove the text appearing when you hover your mouse over image. Is it possible?
  7. I have some problems with image resizing when you are switching from PC site version to mobile. Are there any recommended dimensions for images used in big parallax section, small parallax section, portfolio images and etc.?