When I try to import any video file my Cubase 6.0.6 shows the following message
“invalid or not supported file”
In my Device Setup I have no choice to select video player
In screen Video I have only this:
Video player
device Onscreen window
format fixed
offset 0
active X
Somebody help me !!!
Waclaw
What type of file are you trying to import?
Read this, it was written for cubase 5 but still applies.
https://www.steinberg.net/en/support/knowledgebase_new/show_details/kb_show/new-video-engine-for-cubase-and-nuendo.html
I am having the same issue right now. I can’t load video files in Cubase 6.5, but they WILL load in Cubase 5.
In my desperation, I am about to trash preferences. I tried rebooting several times- it worked when this happened once before, but not now. Any ideas?
And now…
rebooting it the fifth time does the trick!
I had the same proplem. Reinstalled Cubase. Didn’t work.
uninstalled quicktime.
rebooted. cleaned reg and cache files with CCleaner.
reinstalled quickktime.
Viola! Working again! Hope this helps somebody! 
It may help me, even several years down the road here 