I'm trying to see a video in my Opera for Linux mint browser, but when I click the play button it appears the error "Format is not supported or source is unavailable." or something like that. I already tried the players of other sites, such as amazon prime and unity learn, on Firefox and it works perfectly.
My Opera version is Opera One version: 108.0.5067.40 and I'm using Linux Mint LMDE 6 Faye
Here's the error in the Unity Learn player: 