The site lags on smartphones, what should I do?

Question

Web development

In general, there are a lot of videos on the site, they are compressed by 500kb. On the PC everything is fine, but on the phones the scrolling is jerky, the site slows down and does not work well. What should be done to make the site smooth?

Answer 1

There is no quick answer on how to solve the problem 100%
Possible problems
1) Many elements with absolute positioning
2) Many small animations
are triggered on the scroll 3) Heavy calculations are triggered on the scroll.

Answer 2

Possible reasons:
1. Video hosting is slow to upload files.
2. Unstable mobile connection or insufficient channel width.
3. Poor hardware support for the video codec.
4. Overloaded with JS scripts site.