A person controlling the ball on the ground in anticipation of a kick is COMPLETELY protected from all but incidental contact, contact caused by the defense being blocked into him, or contact after the defender has blocked the kick. There is no time limit, there is no rule that allows the defense to tackle him. He is different from the kicker in that sense.
Yes, a punter that has not yet kicked the ball is free to be tackled. A holder is not. A holder may NOT be tackled as long as he has control of the ball on the ground, and there is anticipation of a kick.
In this film, whether he has control of the ball is a judgment call, and reasonable people might disagree on that given that there is no close up that would give a definitive answer. But if he does have control of the ball, he is not "fair game" for the defense to tackle him. He is protected, by rule. As long as that kicker is in place and a kick could be anticipated, the defense can't tackle the holder.
This defender didn't even pretend he was there to block a kick. He never extended his arms, he had one goal in mind, and that was to punish the holder. And that holder could only be tocuhed if he wasn't controlling the ball.
All that being said, this holder bordered on incompetent. First, he set up with his right leg extended forward. That's just begging for someone to fall on his leg and snap it. Secondly, when he didn't cleanly field the snap, there was no fire call, he stayed there in that position trying to regrip the ball. It looks like he did, which gives him protection, but at that point, the kicker's steps and timing are all messed up, and the kick is going to be a no step punch. For a try, most kickers could still make a no step punch kick, so the kick is still "anticipated". But it never should have gotten to this point. And the wing on the left side, #44, plays matador and opens up to let anyone past him. He still hasn't put a hand on any defender, he simply turns to watch the devestation.
I understand this is US football in another country, but I expect better from my high school JV players.