UMLS Terminology Services Metathesaurus Browser. Searching and Interpreting the Search Results.

Keyboard controls: Space bar - toggle play/pause; Right and Left Arrow - seek the video forwards and back; Up and Down Arrow - increase and decrease the volume; M key - toggle mute/unmute; F key - toggle fullscreen off and on.

Alternatively, you can download and play the mp4 video file (192 MB) and the
vtt caption file.