Re the first one: The video is really hard to figure out. There's not enough information to tell what's happening. First they're driving around, then entering homes, then at the end we see one tiny bit of some argument between a cop and someone in a house. Are they looking for pets at the request of home owners in the first one? Are they checking on elderly? We don't know.
Re the roadblocks, they're outrageous and probably illegal, but by the time you can get a court to hear it it's too late. The government's powers in the name of "public safety" are incredibly broad. The main lesson is after an emergency look to your own resources and DO NOT TRUST THE POLICE. DO NOT TRUST THE RED CROSS. Get the heck out of Dodge with what you can. Never under any circumstances go to one of their relocation camps. If it means you're cold, you can live with it. If you miss some meals, no big deal. Avoid all police officers. Avoid all emergency workers. Take no handouts. Refuse all assistance. AND NEVER EVER LET THEM TAKE YOUR FIREARM. If you trust them you'll find yourself essentially a prisoner of the state.
These people trusted the authorities. They left as instructed with little but the clothes on their back, TRUSTING THEY WOULD BE ABLE TO RETURN. Now they see that's not going to happen. The government OWNS THEM NOW. They are allowed at most to take what they can carry. The fact that it's not state property means nothing because the cops have the guns and the people who fled didn't bring any.