It would useful for students to be able to turn subtitles on/off. Currently, we are only able to either have no subtitle files uploaded or have them uploaded but with no option for the student to turn them off if they don't want to view them. Most videos have the on/off capability, so this would be a great feature to add.
Update: Idea added with new course player on next gen LE.
It would also be useful to have an option available for students to choose between subtitles in available languages. For example, options could include "No subtitles," "Subtitles in English," "Subtitles in Spanish," etc. without requiring that multiple versions of the course be created.