restore

the video just playing 1 frame and than stop but the audio is still there, is there anyway that I can restore the video?

I don't know OBS much because it is our social media video people. I am IT and need to upgrade the Windows 7 PC they are using. I see an Export for the Scene, is that all that is needed to put back all settings after the upgrade to Windows 10? Of course, I'll have a complete disk backup with all...