An error occurred while trying to play the video in Opera 48 (Windows 10).
If you play this video in Google Chrome it will play fine.
https://1drv.ms/v/s!AjFqXJlpTvaHrD6FeEz3XvUU6r7_

Another example: http://hdd.anipower.ru/Fullmetal_Alchemist/2/2.mp4
1 soundtrack - Russian.
2 soundtrack - Japan.
Edge, Chrome, Firefox plays this video with Russian language.
Opera plays this video with Japan language.
The video should play Russian.

https://1drv.ms/v/s!AjFqXJlpTvaHrD6FeEz3XvUU6r7_ I have an error and I can not see it in Opera. But in Chrome it plays correctly. Opera 46.0

The video that was sent to me contains a black screen and sound. That black screen is as it should be.

Wndows 10. Opera 45.0

My partners sent me a video https://1drv.ms/v/s!AjFqXJlpTvaHpDkb9RaWuJJSnRcv I have an error and I can not see it in Opera. But in Edge, Chrome, Firefox it plays correctly.

Correct link: https://goo.gl/yy7bKB

Pulled a direct link from animaunt.ru , russian site with cartoons http://online.animaunt.ru/Anime Online/Spring Ongoing 2017/[AniMaunt.Ru] Natsume_Yuujinchou_Roku/Natsume_Yuujinchou_Roku_[06]_[AniMaunt.Ru].mp4
1 track in Russian, 2 in Japanese. Opera plays 2 track.

Description: On many sites you can find .mp4 videos in html5 players. These videos may contain several audio tracks. The problem is that Opera in such files plays the last soundtrack instead of the first one, as it should be.

Steps to reproduce: I created such a file, there are 2 soundtracks in it. You can see it here: https://1drv.ms/v/s!AjFqXJlpTvaHrDuLtZR6nig20L18

Actual result: When play in Opera, you will hear a sound: "Soundtrack number two".
When play in Edge, Chrome, Firefox you will hear a sound: "Soundtrack number one".

Expected result: Must hear the sound: "Soundtrack number one".

OS: Windows 10
Version of Opera: Opera 45.0

P.S.: Recently, my partners sent me a video https://1drv.ms/v/s!AjFqXJlpTvaHpDkb9RaWuJJSnRcv I have an error and I can not see it in Opera. But in Edge, Chrome, Firefox it plays correctly.