tested ogg! OGG WORKS! MP3 does not!
But video with vorbis does not Tried h264 mp4 video with vorbis audio

Hi!
For some videos in youtube i don't have an option to change to HD or even 480p. It just shows one extension only (360p in most cases), however for same videos it shows many options from 144p to 1080p in google chrome. Is it normal?

What format is the sound file? Opera may not support WAV or MP3 playback - that depends on your system - but should support Ogg Vorbis.

Thanks. I just tried to play sounds on social networks using their internal players and some multimedia websites, but all files there probably mp3. Video, i think mp4, not sure. Youtube though plays ok. I will find ogg to test.

Hi. I installed Debian Stretch. Then latest opera 43. No probs with the sound anywhere, Chrome tested fine. But no sound in opera. Closing all tabs, clearing history - no changes.
When i start playing sound - opera appears in pavucontrol as if it tries to play a sound, but then dissapears in a second or two.
I couldn't find configuration of sound in opera settings anywhere.
Can you please give me any advise what i can do to fix it? Thanks a lot

opera-stable 43.0.2442.991
linux-image-amd64 4.9+78
pulseaudio 10.0-1