You seem to be playing the " I'm much better than you" card to belittle my view, however it seems that I'm not Falling for that
Nah. I mean, I do have a lot more grappling experience than you do, but you've never met me and I wouldn't expect you to accept me as some sort of authority without having the opportunity to evaluate my skills personally. For all you know I'm some wannabee internet poser who has fabricated all my claimed qualifications.
I would hope that you recognize that there are people out there who have devoted a lot more time than you have to developing the skills necessary for taking down resisting opponents and that those people might have more insight into the subject than you do.
My accomplishments are i can hold my own with a 280lbs monster and my assessment of the single leg grab is it won't work, particularly it won't work if they weigh 280lbs and have legs like tree trunks. if you put you heaD in like that to push, they will forearm smash you to the ground
Hey, that's great that you can handle yourself in a fight against a 280 pound monster. Those guys are always a challenge, even when they aren't trained. Regardless of your approach (punching, kicking, throwing, etc) you have to be on top of your game. (Unless you are a huge guy yourself.)
When you fought such big guys, did you use some sort of takedown? If so, that would be a good indication that you found some good grappling methodology that works for you. If you did not, then it's not really relevant to your qualifications for knowing what works for takedowns.
When you say "the single leg grab won't work" are you talking about just the particular entry KFM uses in that video or are you talking about single leg takedowns in general? Because if you're talking about the latter, there's a huge amount of empirical evidence that single leg takedowns can work against resistance - even the resistance of strong, skilled fighters.
It won't work against anybody that uses you ducked in head as a target, or someone who takes the opportunity to bitE your ear or grab you by the throat and squeeze the life out of you or bear hugs your neck. Or just an old fashioned finger in the eye,I'N short it won't work anywhere outside a dojo a cooperating partner, things ether work in the real world or they are just demos,
Just about all those responses will typically end up with you on the ground and the wrestler on top of you. In KFM's entry, the opponent's right arm is checked so it's not available for throat grabs, eye pokes, or whatever. The opponent's left hand is at a bad angle for effective grabbing or poking. The opponent's head is not in a good position for biting. In addition, the opponent is off-balanced backward which hurts his ability to strike effectively and he's about a second away from being taken down.
If you have some technical critique of the entry based on your experience with grappling, I'd love to hear it. I have a couple of reasons why that particular entry wouldn't be at the top of my go-to list. If your argument comes down to just "single legs don't work" or "wrestling doesn't work when the opponent fights dirty", then you would probably benefit from some experience with real wrestlers.