After seen the video there is no doubt that the little things are not space debris or ice particles. Maybe some of them are ice or debris, why not?

But the ones that make U-turns and that travel not in straight line can only be some kind of life form, at least to me, they act like interacting with the material that the STF-75 lose (here I believe that NASA did this on purpose, because they want to know and interact with the "ice particles" and "debris" that make U-turns).

NASA you stink!