I have a number of favorite M/M tickling videos. The one I never tire of watching is called "Milked & Tickled" produced by MyFriendsFeet.com. What makes it special? The bottom is young, handsome, and muscular with beautiful skin and he is feather ticklish over his entire body. The top, Richard, is very experienced and knows how to get good reactions. The bottom has two orgasms during the video, each followed by intense tickle torture. It is definitely worth watching.
Other classic favorites are, "It Only Hurts When I Laugh" by Shotgun and "Bound, Jerked and Tickled III" especially the scene with Drew produced by Reluctant Young Men.
JerryB