Those are people who came from the barricaded central square (3-4 blocks down) within few hours after militaries arrived. Before all the morning a car with a loud-hailer was inviting people to the central square "to protect the city". At that very time the central square remained empty (though armed people were in buildings). That is swearing people in video are ALL unarmed people ready to interfere and abuse militaries. (Well, to be accurate there was one more such group several blocks from there.) Note that those militaries are known for giving up to the unarmed civilians with weapon and armored cars several days ago. Note also that those people are mostly hiding faces from camera and that they know and pay attention where the camera is.
There were real people from houses in the arcs and passages around but they didn't come close and were silent. Maybe they wanted to talk or whatever but didn't dare to interfere the group of loud and aggressive people.
These are people came to pro-ukr meeting in our city captured by foreign machine-gunners with unknown schedule that were already known for being ready to shoot and for taking several hostages. Bad place for making movie though, most people in the back didn't get to the camera.
Our city is about 200,000 total (165,000 voters).
Our police chief who organized the protection of our meeting now is among the hostages in Slaviansk if alive.
NOW (after beginning of ATO) all sane people here (independently of their political views) are silent and don't show themselves. All "events" you can see in video FROM NOW are freak show performances.