I was just about to mention that. I’ve done a few Hi-Fi captures over the years. One way around the problem is to have a second copy of the movie. Odds are you’re never going to have dropouts in the same spot.

Also, sometimes a video/audio glitch is caused by particles stuck to a tape. Repeatedly rewinding and playing a problem spot can clear it up sometimes. Depending on the tape, you may have to minutely adjust the tracking to find the sweet spot where the Hi-Fi doesn’t drop out.