So I’ve been making videos for awhile now. I use FCPX on my mid 2010 iMac i7 machine. A customer asked if I could change the thumbnail of the video file I sent him. I know I can do this with dvd and Blu Ray but no idea how to do this with any other video file. I read that Apples Compressor can do this. Unfortunately I can’t update my OS to the required OS compressor needs on my Mid 2010 iMac. So Compressor is not an option for me. Is there another solution that will permanently change my video file “Poster Frame” on a video file that I share with clients?