Nice video here from Texas Lutheran (D-III) highlighting their boot camp.
While some of the activities here were obviously meant for players to fight through fatigue, there were also a couple (like the human pyramid) that look like they were chosen from a fun / team camaraderie perspective. A good mix is always good.
The speech from one of the coaches at the very beginning is really good, and the quote at the end is great as well.
“Every morning you have two choices; continue to sleep with your dreams, or wake up and run them down.”