How to trim, crop, and concatenate a reverse into video at the same time
Run

ffmpeg -ss 00:00:10.50 -t 3 -i MVI_0289.mov -filter_complex "reverse,fifo[r];[0:v][r] concat=n=2:v=1,crop=720:720:600:80[v]" -map "[v]" OUTPUT2.mp4