It definitely wasn't protocol for EVERY house, based on what I saw. Not sure how many houses we searched in this manner though. These house-to-house searches were supposed to be consent based. Sure, people were probably shitting themselves while giving consent but.. it's still consent.
I am pretty sure a tip doesn't allow police to pull you out of your house at gunpoint though. Warrant/consent is still needed. There is definitely not enough info to make a sound conclusion but it's the first video that made me question things. I'm surprised there weren't any citizens who objected to a search (how many houses were searched?). I'm curious how the police would have responded to that... I am guessing "exigent circumstances" in those situations.