Jan.6, 9:42 am — Slightly more complicated animated GIF
Jan 6, 9:19 am — Very simple animated GIF below works
I was able to make the above animated GIF only once after many, many tries. The only thing I did differently was change the strength from medium to heavy.
I was unable to change the ScreenFlow 6.2 video you see below into an animated GIF. I used a strength of heavy.