What I think you are referring to are the Graham v Connor factors such as taking the incident as a whole. Size/gender of the officer or offender are a factor that allows for a greater use of force as it pertains to the 4th amendment. Also, when suspect is fighting/resisting/or fleeing and/or lesser levels of force have been or believed to be ineffective. And I haven’t yet watched the video in question-will probably edit
Edit/watched video in op. Based on the difficulty those cops were having with that guy, a higher level of force would be appropriate to one “level” above what the suspect is doing. So we are talking tasers, batons, pepper spray. However, it also matters what he was being arrested for. If it was vagrancy or drunk in public, I would argue the need or urgency to get that subject in custody is not so great that you would be able to up your force level in some areas. At my department and what I currently teach as a taser instructor, I would advise that the taser is for actively aggressive suspects. He looked mostly defensively or actively resisting arrest and at one point, he had that one cop in a sort of bulldog choke sort of thing-that would have been the perfect time for a taser.
As for the guy’s commentary, Chicago pd are not allowed to engage in foot pursuits unless it is for a violent felony and they have to have a supervisor approval.