I think it's one thing to visualize that motion and another to design the shapes.
This is animated gif that I made from an .mp4 video I found at Homemade Tools. This is the first time I've done an .mp4 to .gif conversion, using the free versions of a video editor I've trying out.
Which gets me to the info bleg. I'm looking for a video editor for my YouTube channel. This video editor (VSDC) isn't expensive to upgrade, but it has far more features than I care about. For my purposes, the screens are way cluttered with things I just don't want. I don't have much in mind that I want to do, but consider a running engine or a machining operation. I can see running those videos at twice normal speed, doing a voice over of and perhaps adding a text screen.
Think of things more like documentaries and less like what kids do with their phones.
So of those of you who do videos for yourself or friends or have YouTube channels, what's a good, video editor without too much bloating in it?