Ah yes, azimuth errors especially on slow speed videotapes like VHS and Beta. It's almost the case that you only have to look at the audio/control head and it will go slightly out of alignment. At least the 1986 VHS wedding tape was the original so all the audio information was still there, but not picked up when played "correctly".
The bigger problem is when all we have is a copy of an original that was not played back optimally. Generational loss is bad enough but on top of that an azimuth error - even just a slightly dirty or worn play head - can mean nothing can be done to retrieve what was already lost when the copy was made. "Original tapes, films and discs if at all possible, please."
On the other hand, something can be a whole lot better than nothing...
https://youtu.be/YwqtWgFb_mE