COVID Shut Down rules.
But is the video real or staged? Did they edit it?
Please understand that in DC, the only thing that the NG is doing is creating safety for the police so that they can do their job and arrest criminals which they felt unsafe to do before. Additionally, the DC mayor has done an about face after the cameras turned off of her and she is working gratefully behind the scenes to finally clean up the mess.
The NG is not arresting anyone.