I sort of have a solution, but it doesn't work 100% of the time
It's worth a shot tho.
If you are on Mac, then make sure that you don't have Elmedia Video Player.(And never reinstall that **** ever again.)
That's step one.
Then delete AvidVideoEngine folder, which is located at Macintosh HD>Users>Shared>AvidVideoEngine. Then reboot your machine.
Go to avid.com, download the Pro Tools installer, open it and go to the "Codec Installers" install the codec, then launch Pro Tools application., go to Playback Engine, try to enable the Video Engine.
sometimes you need to switch your Playback Engine to a secondary option (something like, HDMI) then switch it back to your Audio Interface alone with the Video Engine.(This step is kinda superstitious, I don't really understand the reason behind this, but I'd better write it down!)
Hope that will work for you.
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