Loopstream

Organize YouTube videos and practice with repeatable loops.

Replay the moments that matter. Learn at your own pace. The moment of impact in a golf swing, a quick move in a dance routine, or the subtle movement of a musician's fingers. Sometimes, the details you want to see go by too fast. Loopstream is a YouTube extension that makes it easier to watch closely, repeat specific moments, and practice at your own pace. Loop a section, slow things down, or step through a video frame by frame to catch what you missed. You can also save your favorite practice sections and come back to them anytime. KEY FEATURES • Loop exactly the section you need Set A and B points to repeat any part of a video automatically. Fine-tune the start and end points in 0.1-second increments, so you can focus on the exact movement or moment you want to practice. • Catch the details, frame by frame Take a closer look at movements that happen too quickly to follow at normal speed. Step backward or forward one frame at a time to see how a movement develops. Hold down a frame-step button to move continuously through frames and follow the motion. • Watch at your own speed Adjust playback speed from 0.25× to 4×. Slow down tricky sections to understand the details, then return to normal speed or speed things up as you become more comfortable. • Save your practice sections with Practice Cuts Found a section worth revisiting? Save it as a Practice Cut. There's no need to search through the video or set up the loop again. Just open your saved section and pick up where you left off. MORE WAYS TO MAKE PRACTICE EASIER • Predefined Loops — Loopstream automatically detects timestamps in video descriptions and turns them into ready-to-use loops. Preview a section, adjust it, and save it to Practice Cuts if you want to keep it. • 3–2–1 Countdown — Give yourself a moment to get ready before playback begins. Especially useful when you're practicing movements along with a video. • Precise Timing Controls — Check the current playback position in milliseconds. Frame rate (FPS) can be estimated automatically or selected manually. • Practice Cut Management — Rename, edit, or delete saved sections, and see where each one sits on the video timeline. • Your Own Practice Library — Organize videos into folders, mark favorites, and quickly find the ones you want to practice with. • Keyboard Shortcuts — Control playback, looping, countdowns, and seeking even while the Loopstream side panel is focused. • Language Options — Choose your preferred interface language directly from the side panel. GETTING STARTED 1. Open a YouTube video and launch Loopstream. 2. Choose a section from Predefined Loops, if available, or set your own start (A) and end (B) points. 3. Adjust the loop boundaries and playback speed to suit your needs. 4. Use frame stepping whenever you want to examine a movement more closely. 5. Save sections you want to revisit as Practice Cuts. KEYBOARD SHORTCUTS • R — Toggle looping on/off • B — Start the 3–2–1 countdown • Space — Play/pause • ← / → — Skip backward/forward 5 seconds (hold to seek continuously) These shortcuts also work when the Loopstream side panel is focused. Arrow keys keep their normal behavior when you're using text fields, sliders, or selection menus. GOOD TO KNOW [Frame Stepping] To use frame stepping, play the video briefly so Loopstream can detect its frame rate, or select an FPS value manually. Fractional frame rates such as 29.97 and 59.94 FPS are supported. Automatic FPS detection estimates the frame rate from observed frame intervals. Results may vary, and detection may not be available when frame timing is inconsistent. When you step through frames, playback pauses and looping is turned off. [Predefined Loops] Predefined Loops are temporary sections automatically created from timestamps found in a video's description. To keep one for future practice, save it to Practice Cuts. [Local Storage & Privacy] Your saved videos, practice sections, folders, favorites, and language preferences are stored locally in your browser. Loopstream does not upload your practice library to Loopstream servers or download YouTube video content. Loopstream is independently developed and is not affiliated with, endorsed by, or sponsored by YouTube or Google.