That video explains it a bit, but if you don't know what Survivor is, I'll quickly summarize: Two (or more) evenly split teams compete in challenges each round. Some challenges are reward, and give you food and building blocks and other useful items to use around your camp. The other challenges are immunity challenges. The winner(s) of these challenges have their tribe safe for that round, while the loser of this challenge goes to tribal council. At tribal council, the tribe must vote out one of their own teammates out of the game. Forever.
If you need any further explanation, check out seasons one, two, and season three which is currently being uploaded onto that guy's channel. Otherwise, the application information is in that video I linked up above! Hopefully you consider applying, cuz it is a fun journey to be a part of!
This seems interesting I will check out the video once I'm in an area where I can watch but if I were to apply I have the same concerns as traso.
Sorry for the somewhat late replay to this, but the upcoming season (Season Four) is expected to happen the second weekend of January, probably that Saturday. If this is too sudden or not a good enough time for ya, then you can still apply for Season Five instead, which doesn't have a planned date yet but will probably happen during the spring or early summer of 2018.