@pindos Thanks a lot! It worked!

@jimunderscorep I recently updated to the latest mint distro (19.1 Tessa). I installed ffmpeg codes. But did't help. I have also noted that there are also some youtube videos not playing too.
In windows, all videos play on opera though.

@leocg Thank you for your reply. I had already searched through your links but didn't make it!

Hi everyone.

I have stored a few videos on my google drive. Opera cannot playback them on linux mint, but the same videos can be played under windows 10 opera. The video formats are mainly .avis. So far I have tried installing ubuntu restricted extras, multimedia codecs and libk 3b6-extra codecs with no result.
Opera is a fresh installation and updated to the latest version. Note that chrome and firefox can play my videos on both windows and linux. Any idea?