Interesting video. Probably too small to be a balloon with internal lighting, not a plane or bird because of the erratic pattern of movement, not a computer graphic–so, this is a likely unknown object, and what’s even more interesting is that it appears to have been ‘called’ by CSETI Montreal. The ability to call these lights is one of the most perplexing aspects of the UFO phenomenon.

https://www.youtube.com/watch?v=ZTWIMZC4K6g
Story Source:
https://www.youtube.com/watch?v=ZTWIMZC4K6g