When embedding videos directly into Canvas (as opposed to using a player such as Vimeo or YouTube) there is no way to disable the playback controls. We like to make sure that our students can't fast forward through videos or increase the speed so that they are watching it at high speed. We feel that they can't absorb the content properly if they are fast forwarding the video or playing it at high speeds. Vimeo and YouTube allow you to disable playback controls, but there is no way to do this on videos that have been uploaded directly into Canvas.