The police officer holding the leg of the suspect has been derided many times on the internet. And it does look somewhat comical the way he is dragged around by the suspect.
However, his actions are effective in preventing the suspect from escaping. It is the other officer who should then be taking advantage of this by clinching with the suspect to take him down. Instead, he attempts to use his baton to effect pain compliance which fails. He only continues to use the baton which makes them both look foolish.
This is yet another example of why police need at least fundamental grappling skills, and their training is often not up to the task.