Am I guessing correctly that what you are saying is that you used OBS to make a recording, and the resulting video file isn't as long as you expected??? ... that isn't typically referred to as a video source (commonly referring to a video file used as a source in a scene) ...anyway
Did you follow the guide and record to MKV, or did you change it to MP4??
if MP4, that is your problem. short version - most likely the recording is lost, follow the guide and remux to MP4 after recording if need be.. sorry
is your PC up to the task of real-time video encoding?
