echo "Hint is added to mp4 files or mov files? ? " chmod go+r 2006-04-14-turon-func-b.mp4 \ 2006-04-14-turon-func.mp4 \ 2006-04-28-turon-inverse.mp4 \ 2006-05-12-turon-logic-a.mp4 \ 2006-05-12-turon-logic-b.mp4 \ 2006-05-26-turon-then-for-all.mp4 \ 2006-05-26-turon-then.mp4 \ 2006-06-02-turon-js-1.mp4 \ 2006-06-02-turon-js-2-demo.mp4 \ 2006-06-30-turon-group.mp4