Interesting to say the least, Here some of the back story from YouTube:

August 15, 2009. I spent time in a more rural region in Austria (Europe) but there were chemtrails OPs though. I couldn`t believe what I saw there. Hundreds of circular, most transparent objects flew near the chemtrails or came out of the chemtrails. I filmed a lot of chemrails on that day.

Please consider that a few minutes later after I filmed this chemtrails I filmed another chemtrails from excactly the same position as I didn`t move away and though the chemtrails was in the same direction there was nothing to be seen (didn`t film towards the sun).

Btw. I filmed lots of chemtrails that day in all kinds of directions (others even towards the sun) and there was nothing to be seen.

I dunno what this objects are. Maybe they came out of the chemtrails. Are it ORBs? UFOs? Plasma boxes? Was it produced from this kind of chemtrails and does it have a special function? However, it resembles objects i have seen occasonally during/after chemtrails OPs and the objects were transparent, circular and fairly big (coz i spotted them at a lower level) and on the footage I only saw one or two white points! I filmed with a Panasonic SDR-H80 HDD.