Glad you've found a passion not only to cave, but to film yourself caving! I film all my caving trips, except the one that I forgot my SD memory card for...
Any who capturing what your seeing is an awesome experience and you get to share it with others like you're doing now.
I will say though, you should probably wear a helmet.
I have this one piece of footage that I'm filming whats going on in front of me and if you listen to the noise, you hear this THUD, slip, and slide. One of my best friends who was following right behind me, stood up, thought he had plenty of head room, but ended up putting a crack in his helmet with the sheer force of standing up. He hit the ceiling with such force that he also kind of slipped and graciously fell to the ground.
If he didn't have his helmet on that day, without a doubt he wold have been in some serious trouble. Cracked skull, concussion, bleeding... God knows what.
Cave safely so you can make more videos brother!
I also cave in Virginia, and trust me, there's over 2,300 hundred caves in VA, and out of that 2,300 more than 250 are considered Big caves. Bath County is a honey hole for them.
Best of luck man!