A couple of decades ago, the television industry figured out how to speed up an audio track without affecting the frequency; ie, the actors didn't sound like chipmunks. The purpose was, of course, to allow the insertion of more commercials without cutting the program content.
It seems to me that the speed increase has accelerated over the years, and it at a point where I sometimes have trouble understanding all of the dialogue. <insert old fart remark here> This is especially noticeable when watching British programs.
The program I use for watching television and movies on my computer allows me to slow down the playback rate. With most programs, a small reduction to 94% produces easily understood dialogue. It's surprising what a difference it makes. Why don't the makers of DVRs put such a function in their devices?