Video appearance differs at iPad and at a browser!

I have a video stream from an external video source integrated into an iframe.

On an iPad it was working flawless 2 years ago.

Now, it’s not working anymore while on a browser it’s all fine. It particularly has to do with an iPad (sorry, I have no tablets of another brand).

Please see the screen shots below:

Safari (which is perfect and flawless):

iPad (same Lovelace, but 3rd column not working):

Anybody understands why the “HTTP State 404” is appearing on an iPad? The problem occurred more than a year ago, but on my prior post on this forum, nobody responded. If nobody knows, should I post it at Github and where?

I you want to test one of the video stream I have embedded the iframe below:

type: iframe
url: >-
  https://webtv.feratel.com/webtv/?pg=5EB12424-7C2D-428A-BEFF-0C9140CD772F&design=v4&cam=5277&c2=1
title: Hinterglemm Tal - 1.070m