Actually now that I saw this vid, just before midnight of new year, me and my older sister went to see new years firewords to city-hall. My sister (the 100% sober one, she dislikes alcohol) pointed a the sky and asked what the heck those are. I saw three dots flowing in the sky in line on uniform line. Me (not so sober that evening, but still on the side of clear) just stated that they are those parachute stuff as somebody mentioned earlier this thread. But on next newspaper that arrived there was article on wierd light phenomenon, people seeing 3-5 dots moving in line at the direction of wind. Airforce stated that there was no air-traffic in that area that night. Again some theorised that they were those parachuted emergency fireworks or illuminating fireworks that wind carried just carried along, or hot-air balloons that do glow slightly on night. And ofcourse, then there were those ufo-believers. I dont believe in ufos, (and until some fricking ufo crashes on my yard I wont) but that was very exciting, I really wonder what they were.
Most likely they indeed were just emergency fireworks, but they looked just like that on the vid.