@UserU
I believe @dkbit98 wanted to say about the page speed and not the bandwidth. And it's true, a page with a video embedded decreases the page loading time. It must be horrible for users with a smartphone/tablet
Yesh, I'm an avid mobile user so I can definitely relate to that. :c
You don't need to do a screenshot. Use this for the image inside the link:
https://img.youtube.com/vi/video-id/0.jpg
Where "video-id" is the random-looking thingy from a Youtube URL. So like this:
On mobile, it's way more difficult. You have to edit the URL, then manipulate the BBcodes to incorporate both image and the URL.
Not to mention it's easier for users to clickbait (e.g. Rickroll).

Source: From another forum