John Danaher - Fastest Way to Become Effective in Standing Position
Bernardo Faria BJJ Fanatics YouTube
Danaher on getting effective on the feet quickly: stance, grips and the takedowns that actually appear in BJJ.
Takedowns
Collar Tie
Cupping the back of the opponent's head and neck to control posture and set up snap-downs and ankle picks.
Also called collar tie, neck tie, head tie.
Where it shows up
Related techniques
Resources
4 resources
YouTube videos
Gi & no-gi Beginner
No-gi Intermediate
Tony Tolbert sets up the ankle pick from a collar tie by circling until the far foot steps, then breaking the shoulder down and taking the arm over the leg.
Gi Beginner
Three gi takedowns off the same cross-collar grips, a white-belt standing package from Chewjitsu.
How to hand fight for #wrestling and #BJJ - Clearing Collar Ties #wrestlingtakedowns #judolife 
Systematic Wrestling YouTube
Four ways to clear a collar tie - elbow pass, rip, thumb post and taking the underhook - so you can get to the legs. Short and dense, aimed at no-gi and wrestling.