How are these videos made for the web?

Question

HTML

1.on what software?
2. How is it compressed so that it weighs little?
3. And how to make it automatically on the iPad.
mokselle-dev.ru/tesla
in the header is a video which
Thank you

Answer 1

the easiest way to do this is through this plugin
www.seanmccambridge.com/tubular

Answer 2

here is this CoverVid plugin ,
either any other one is suitable for inserting a video into the background,
or you can apply all the styles to your video!