On most Netflix players that I've used and also the PS3 native video player, the systems support a thumbnail scrubbing mode. I'm not 100% sure that's the correct term though because I'm not talking about actually scanning through a video, but just flipping into a scene selection mode.
Upon further research, PS3 called this "Scene Search" and Netflix calls it "timeline" (see attached images for example)
It's a feature I sorely miss with both the native XBOX One media player and the PLEX player apps for XBOX One and PS4.
I though that Plex supported "media indexes" where it would index the contents of the video in order to support this feature.
Are there some player platforms where this feature is implemented (roku maybe?) and others where it is not (XBONE/PS4)?