The QA test  MDLQA-14065 may be used to test this issue fix, as described in  https://docs.moodle.org/dev/QA_testing#Failed_tests  . Or... Log in as admin Install a right-to-left language pack; such as Persian (fa), Arabic (ar), Hebrew (he), ... Create a course Enter the course and turn editing on Add a label to the course (Type "video" as the label text and make it a hyperlink to https://www.youtube.com/watch?v=3ORsUGVNxGs  ) Switch your language to the right-to-left language you installed at step 2 above and then go to the course main page and Click on the play icon on the video preview to play it. Verify that the progress bar is moving from left to right Verify that if you move the location of the video scrubber in the progress bar to the right, you are further in the video. Verify that if you move the location of the video scrubber in the progress bar to the left, you go backward in the video Verify that if you move the volume bar to the right, the volume is increased. Verify that if you move the volume bar to the left, the volume is decreased.