How do I disable auto-hiding the control bar

By default, Bitmovin's player controls auto-hide after 5 seconds. To keep the controls visible permanently, you will need to override certain key CSS styles used by the player.

As of player versions 7.0+, the styles to override are:

1.bmpui-controls-hidden {
2    all: unset !important;
3}
4    
5.bmpui-ui-controlbar.bmpui-hidden {
6    visibility: unset !important;
7    opacity: unset !important;
8}
9    
10.bmpui-ui-titlebar.bmpui-hidden {
11    visibility: unset !important;
12    opacity: unset !important;
13}

This will keep both the control bar, and the currently playing video metadata (title and description) from auto-hiding.

Other styles can be overriden in a similar fashion. Please see Player UI CSS Class Reference for a full reference.