Whatever software was used to create a proper video from the GIF seems to have done some kind of framerate doubling by inserting interpolated frames. It alterna

Whatever software was used to create a proper video from the GIF seems to have done some kind of framerate doubling by inserting interpolated frames. It alternates between a clear frame and one with odd motion blur throughout. Also, I reckon the weird frame duplication is an interaction between the software used to create the GIF and the software used to turn it into an edited video later. More specifically: - The GIF has a non-standard framerate of 14.56 FPS. This means that it's probably playing about 3% slower than the original video, which isn't perceptible and isn't particularly important by itself. - The video has a more standard framerate of 29.9 FPS. The software seems to mostly handle this by doubling the framerate with interpolated frames, as described above. However, this doesn't quite fix the problem - roughly every 40 frames it'll be a frame short. - Sure enough, there's another frame duplication about 40 frames after the first.