I love to watch caving videos: much better for someone younger and foolhardier than me to actually do the climbing and clambering with their gopros. I'll continue to enjoy things like air, vast open spaces, and vicarious experiences.
People take a lot of safety precautions now, reasonably, but every once in a while the cavers on YT will do something just stupid and it baffles me. "The water's ice cold and up to my nostrils, but I really want to see where this tunnel goes! Going to turn my lamp and camera off for now to save battery, see you in a few hours!"
Some of the stuff describe in the spelunking journal is insane, like "okay, we'll rappel down this giant cliff, then there's a pond at the bottom, so we brought our scuba gear..." Cool to hear there's videos out there! I had never thought to look for some reason. When I went caving (around 2005), it was a 9 hour journey and my digital camera died on the 2nd photo, which sucked.
It is pretty awesome, really. Definitely adventurous. I'm sure for people brave, fit and unwise to enough to do it, that's an amazing experience. People do it under the ocean too. The problem is being hours down in a cave that can only be accessed by experts at rock climbing and scuba diving is just about the most remote location possible.
Im a fan as well, their videos are excellent and they often do trips with other cavers, so you can find other small channels through them if people want more "cave content."
What trips me out is towards the end of each video where they'll be like, "Alright, Brad is heading back so I'm going to wrap up too. We've been in the cave for 12 hours, probably a good time to head up." 8+ hours of squeezing through cold, dark passages sounds like actual nightmares I've had!