On YouTube the captions size increases dynamically when you enlarge the screen (for instance entering full screen) but I can’t see anyway of achieving this with Kaltura. The only setting I have found is in the KMC Studio, adjusting the player’s caption size. But that number becomes a static number and the end user has to figure out that there is an option where you can change the size. But even then the size becomes to small to be practical (max size: 24) when used in a classroom from a projector.
Have I missed a setting or is YouTube just better at this?