I was wondering if morse code.
I slowed the video down to .03x and it makes the flashes a little easier to read but I'm not great at morse code but I do think there is something there because it doesn't seem to be the same pattern each time. Either a location/coords to match the scene going on or pointing us to something. The flashes actually go a total of 4 times/segments, the 4th as it fades to the next scene and if those are all dots then there are 5 dots which means the number 5 as the last section. There is a strange flash in the middle of the segments a few times where it doesn't fit the dot or dash of morse code so maybe it means a space, where the filament lights up and then the whole bulb glows - I was counting that as maybe a mini break/space in the segment itself. There are obvious long pauses between each segment of flashes. I'm not sure how to interpret the filament as either a dot or dash or mini space.
I've tried figuring it out a few times and each comes up a little different than before but the beginning of the 1st segment seems to say "at" or "af" but I'm not 100% and there also seems to be a clear 1 in the 2nd flash segment and the last segment being a 5.
I happened to be looking around the q post 101 since OP mentions the video length (even though I see it's only 1min) and post 101 itself is talking about a huge key graphic and q post 125 is a picture of a city with the file name _AF1_5A.png and q post 130 with picture and file name _AF1_5A_2.png which have some similarities with the morse I was getting if I was even doing it right. Continuing with the q posts, Q keeps saying the graphic is the key... the graphic around these posts and that gets updated is in q post 132 and includes the pictures I mentioned. It's also interesting at the end of the video, 34 sec mark, they zoom out from Hell's Kitchen aka Clinton in New York, specifically that freeway lit up is the Port Authority Ramp 96 https://goo.gl/maps/Pcg8R6JaXCihDcoCA.
Someone better at morse code needs to look at this at the slowest speed possible.
I was wondering if morse code.