Any insight to this?

Time: Around 10:30 pm on 4/13 Location: Cleveland, OH So it’s a crazy lightening storm going on tonight in the Land. I was on my roof watching it with my girlfriend and noticed these small dots moving through the sky. It didn’t look like planes and they were all bunched up together. I go on IG shortly later and see a Timelapse video of the storm and what I saw was in the video. No clue what it could have been if anyone on here as any insight?