It's almost like they were talking out their asses, got called on it too frequently, and retracted their video because it was just too full of it to keep it up.
The rules of legislative bodies tend to be pretty public and static. A rule like, "don't bring a bullhorn in to interrupt proceedings by yelling over the representative who has the floor" doesn't seem like a particularly strange one to be pulled out at the last minute. It seems pretty common sensical, the sort of rule that will have been around for generations.
Maybe, just maybe, you watched a video that was being a little bit dishonest, a little bit sensational, to get the clicks?