I for one am a text person, and for me video is death - the end of my attention. Very very few videos use my time as effectively as I can when I am setting the pace and maybe deciding when and how to skip around.
I agree that if something can be explained in text I'd much prefer it over a video, but if you need (or expect some people will need) to see a video a GIF seems like the weaker option for how to present that.
If you're given a task that is not obvious and requires pauses for familiarization at several steps, isn't it easier to deal with text+illustrations than with video ?
Give me (please) well-done illustrations.