A 40-minute documentary rarely fits a 50-minute lesson. TubeChop lets you clip the four minutes that actually matter, so class time goes to discussion instead of scrubbing a timeline in front of thirty students.
Pick a start and end time, get a short link, and drop it in your lesson plan, slides, or LMS. Students see the segment you chose, played through the official YouTube player, with no software to install and no accounts for them to create.