I hear you on the gifs. We wrestle with this a lot - whether to make static graphics and diagrams, gifs, or videos...
We'll take this feedback into advisement for the future, but we'll have to figure out some strategies to use the gifs for now (videos are surprisingly hard to support across platforms so we opted not to use them for these small tasks). If possible I would suggest students work side-by-side with two computers. One has the instructions up on screen and the other the spreadsheet.
Sorry, that's the best I can do. I hope it gets better for you and your students over time.