Just doing some quick looking at this and would like to know your point in posting it.
Comparison to the Seattle/Everett, Washington area does not appear to match up, so how is this gif related?
Based on the contours of the land as seen by the shading/shadowing, the land area shown is much more hilly or mountainous than the Puget Sound area, and I've looked at the entire area from the Canadian border to Seattle. I'm also not seeing as much obviously developed lands as would be expected in the only location where this video might potentially make sense (directly over Everett Naval Base, facing north).
While there are mountainous areas in the vicinity, those locations do not appear to be in the immediate target area of the suspected launch site. Finally, the waterways do not seem to match up. The target area, from aerial view, has much broader expanses of water.
Not calling you out or saying this video is fake/larpy, but without additional data such as location/facing, it's not something that really seems to match up to the missle launch out of that area.
Frankly, judging from the a/c (the underwing mounting, called an "anti-shock body", is similar/same as that on a 737) and considering the paint scheme is gray it is distinctly possible this is a mil aircraft. Based on the view scale, the altitude appears to be somewhere between 8-12k feet.
It kinda looks like Afghanistan, frankly.
See video for a good overall aerial scan of Puget Sound & Juan de Fuca. Different altitude and weather conditions, but you get the idea that it's a lot flatter in the immediate region than this video appears.
Need moar info, pls.