My knowledge and skill are in their infancy. However, the way that I did this was by making a gif from images instead of video. (Gonna do it with video later).
I went to create an image and got this image in the meme generator then I right clicked to select "save image" and saved the image as "gif1". Then moved the arrows a little bit and saved it as "gif2", moved them a little more, added more arrows and saved as "gif3" so forth and so on. I had 8 images saved to gif here.
I then went to the gif maker and chose to upload my images, I held "cntrl" and selected all 8 images and uploaded them into the gif maker. There may be a better way. But as I said I am not by any means experienced here. I hope I helped you a little at least.