I use box stretching to target often. It suddenly stopped working. green arrow appears but none of the other indicators appear and nothing is clickable in the selected group. Any advice to resolve this?

sh: /Users/Jonathan/Documents/Animator Videos/ffmpeg-4.2.2.cpgz: Permission denied
mac high sierra 10.13.6 I've followed countless tutorials to get ffmpeg installed properly, starting with libfredo6 for animator in sketchup. After downloading the zip and or package file from ffmpeg.org, I don't get the same results from the step by step tutorials. Even in terminal I'm getting unsuccessful responses to line commands at a certain point. I found animator very user friendly and edited a great technical video very efficiently. I'm stuck not being able to generate an mp4 video file to share on my website. Please help

Any advice concerning ffmpeg video download. I followed the link and the FFmpeg.org pdf directions but didn't find the exact steps available and got into a baited ads trap and downloaded similarly labeled ffmpeg files that were unrelated. I successfully created an edit in animator and would love to get it to mp4.