@acufftg,
At this time we do not have this capability but it is something high on my mind as a new feature for a future release.
I’d like to make it possible for creators using video and audio content with supporting javascript APIs to make this possible — eg only display the button or automatically mark as complete when the media is completed
Youtube, vimeo, wistia, soundcloud all have APIs for this stuff we just haven’t written the integrations yet
In the meantime you could add this behavior on your own via css, a custom field, and javascript, but there is a bit of custom development involved in that. If that’s something you’d like to pursue but you’re not a developer please check out some of our 3rd party developers that might be able to help you out: https://lifterlms.com/docs/do-you-have-any-recommended-developers-who-can-modifycustomize-lifterlms/
Sorry for the mixed news…