We LOVE HDDR!! It is very basic Vaudeville slap-stick humor in a frontier setting, with down-home cooking (fried chicken BBQ ribs). Basic, simple, plain, and my family's hands-down favorite dining experience in the world.
But it really doesn't appeal to everyone, and a handful of people will be totally mystified by what the heck the fuss is all about. On our last trip to HDDR, there was a family behind us with a 2-ish year old who was watching a portable DVD player with Sponge Bob cartoons LOUDLY!!! It was very annoying and distracting, and my husband politely asked them to turn down the volume. They didn't, but about 15 minutes later, we noticed that the sound had stopped. We turned around to find that the family had left in the middle of the show. It definitely was NOT for them.
It does depend somewhat on the cast on a given night. There is a very flexible script, and the cast does involve and respond to the audience to some extent, so being there can be different from watching a video. I'd say do another search and try to find a few more videos, but if you still don't seem to "get it," you might want to save your $$ or credits and just skip it. It is a lot of $$ to blow on one night!