Question Linux Mint VM not playing any videos in Firefox

mangaman

Honorable
So I updated and installed all of the latest packages from the update manager. However, I still can't play any videos in FireFox. In YouTube, I get a playback ID: LIRJWJYYP-HGZnGI and for any jwplayer, I get an error code 102630.

I installed the codec FFmpeg but that did not change enything. I installed the package 'browser-plugin-freshplayer-pepperflash:i386' but the issue is still persistent. I know it might be a codec issue, but what codec should I install?
 
Yes. Using Mint 19.1 live-CD version, I can play videos. I even did a clean VM install of 19.1 and I can play videos. Look like everything is working fine on 19.1, so to save some headaches I'll just use 19.1. Thanks for the feed back though.