Hey @facb69,
I don’t have any specific and technical explanation or solution for you there but alternative for youtube.
Try to use Invidious as a PWA. It works just fine.
Thanks @Gregoire but I did not understand how to “…use Invidious as a PWA”.
I know about the website and all but never heard of an app for it or how to use it in another way.
Just for a closure on this matter, I could only managed to cast to my Chromecast using VLC.
Netflix shows the cast icon but don’t connect and YouTube, Emby and Spotify don’t show the icon.
Since I only use Chromecast at home, I uninstalled YouTube, Emby and Netflix from my /e/ Motorola.
Still using Spotify Lite from /e/ app store (it is working now the way it should) and New Pipe from F-Droid.
Thanks for the attention.