I just signed up because this page comes up when I Google "opera android stop video autoplay".
Video autoplay is the single worst feature of Opera for Android.
I'm quietly browsing the news on my phone while at place XXX - any place you can imagine where it wouldn't be suitable to play loud sound - and then all of a sudden, I get full screen video with full sound blaring out of my nice quiet web reading session.
This is NOT OK. I do not consent to web sites auto-playing videos.
On my PC, I can control autoplay with flashblock and other tools.
But on Opera for Android, I'm a hostage - and you are enabling websites abuse of me. They are bombarding me with loud sounds and videos I do not want and did not ask for, ramming video ads down my throat while I try to read through a text article, and you're helping them with full screen video.
Frankly, I don't want full screen video for any mobile web browser - I use youtube when I want video - but I understand that other people have different preferences.
But at least provide an option to disable auto-play! It's incredibly, unbelievably rude, and makes me afraid to browse the web with Opera.