yes, its totally understandable that something would be wrong with the tapes. Its an analog source, and the format has LONG been dead. They are old tapes. One thing I will say, is that given all that, the picture looks great, especially when compared to its rival VHS. The picture is not milky at all.
It looks like the original creator added some sharpening to the picture. There is a bit of noise that eludes to this. But otherwise it looks decent.