Video tracks not displaying

[ActionMediaLLC]

I have a video overlay on a track above some video and it won't display. It opens fine in the source viewer but doesn't work on the timeline. I'm also having trouble with any video displaying. After a few minutes of editing it will only show black and play the audio. Sometimes the playhead will stop moving as well. I'm editing .mxf files on the timeline.

[MyerPj]

That's not much info to go on. Does the graphic have alpha or are you keying it?

Without more info, clearing the preferences, deleting the cache are first steps. Hold down shift while starting PP and chose from the dialog. Also, resetting the workspace or trying a default workspace.