Generally you stop every 2-4 hours to stretch your legs, go to the bathroom, get fuel, etc.
So if Google Maps says a drive takes 10 hours, I would factor at least another 1.5 hours for stops and a meal somewhere along the way. So 11.5 hours or so if you don't stay stopped too long. 0 miles per hour brings the average down quickly.
Tom Scott, he has done a video every week for like 10 years. Sort of a science travel adventure nerd. His videos are generally short and interesting.
Veritasum - Science guy with some interesting topics
Donut Media - If you like cars, they do some interesting and funny things while not being complete asshats.
The Proper People - Abandoned places, nice videos and respectful exploration.
Cash Jordan - Gives tours of NYC apartments from tiny studio apartments up to multi-million dollar penthouses.
Geography Geek - A lot of interesting geography-related facts.
Knob Feel - Short and sweet reviews of various knobs.
Vice Grip Garage - If you are interested in how old cars are repaired and have lots of time, he has many ~1.5 hour videos of dragging old cars out of the bushes that haven't ran for 20 years, getting them mostly running, and driving them home.
Polyphonic - Interesting video essays about various music and musical artists.
Generally NO, the only acceptable defacement of caves I've seen are bolts to accommodate rappelling down shafts. Of course with commercial caves they have to do quite a bit of defacement.
That's definitely admirable. Do you have lights/stairs/hand rails?