Can't play some HTML5 videos, while my second Ubuntu machine can.

[Zead]

Video format or MIME type is not supported.

Restricted Extras are installed. It works on Ubuntu, but doesn't on this Linux Lite machine.

Browsers are both Firefox. Many HTML5 videos work (like YouTube etc...), but some don't.

EDIT: Nevermind... It seems Privacy Badger is the problem.

[Valtam]

So, give us the exact url's of the ones that don't.