I have not seen the video so I can't comment on it.
However, you cannot obstruct an officer from doing their job. If that means being held under gunpoint, it is an action that could be taken.
It cannot be anything, it must be a threat were there is a lot of potential for harm, e.g someone has been killed in the area.
Something on this scale is extremely rare, however, house to house searches are nothing new. It happens whenever someone is holed up in a building. This was just a much larger scale of it.
I'd be the first to say rights are being stripped away. However, there is never going to be a time when an individual right is going to trump collective protection. It's the reason we have a society instead of tribal lawlessness. It's the reason we choose to come together as a group to solve the problems within our group, since before the time of Babylon this has been the case.
The truth is, you can't believe the Sunday school version of laws, it's much more complicated than, "I have the right". Yes, you have a right, but then there is context and circumstance, of the crime. It's not that simple. And, those rights will only be questioned after the fact. This is not a fault of America, it's how every civilized society works.