Hey welcome to the game!
As far as videos go there aren't a lot; Live In The Labyrinth was an official live stream that can be found on youtube, the players and GM seem new to the system and some mistakes are made. HCobb also has a small youtube channel with some TFT play
here.
In The Labyrinth has everything you'll need in it, the RP system, GMs guide, detailed game play examples and it has a monster section in it; additionally making your own monsters is pretty easy.