TubeRepeat separates two practice modes that most tools treat as the same thing. Repeat mode is about precision isolation: you set an A point and a B point anywhere in the video down to a tenth of a second, and that segment plays endlessly with no scrubbing or clicking. Loop mode is about sustained session control: choose your speed, loop a segment or the full video, name the session and share a link that restores everything instantly.
The tool is built around deliberate practice, the method behind elite skill acquisition, which depends on isolating weak spots and drilling them at manageable speeds before returning to full tempo. That makes progressive speed training and A-B looping central rather than add-ons: you can start at half speed, let tempo step up automatically every few loops, and track exactly how many times you have repeated a passage. Keyboard controls let you set loop points mid-song while your hands stay on an instrument.
It runs entirely in the browser with no account, no extension and no download, and the typical audience is musicians working on difficult passages, language learners shadowing native speakers, dancers breaking down choreography, and students rewatching a short explanation that did not click the first time. Sessions are portable by design: each loop encodes its video, boundaries and speed into a URL, so it can be handed to a teacher, bandmate or classmate and reloaded identically on another device.
