Key point

Start with Recommended, balance clarity and size, then inspect and share the output.

Steps

1. Open Tools > Video Compression, choose a video, and review its original size and preview.
2. Select Light, Recommended, Strong or Maximum and compare the estimated size. Recommended is a useful starting point.
3. For specific needs, open Custom and set resolution, codec and quality, then Apply. Resolution will not upscale the source. H.264 is generally more compatible; H.265 needs device support and may not play everywhere.
4. Start compression and wait for checking, encoding, verification and saving. You may return to Tools or lock the screen, but do not force-stop the app.
5. Smaller results save automatically to the gallery. View the video and check fine detail and sound before sharing.

Options, limits and troubleshooting

• Light prioritizes clarity; Recommended balances quality and size; Strong reduces size further; Maximum prioritizes small files and deserves an extra compatibility and detail check. Size estimates and compression percentages are not guarantees.
• If the result is not smaller, it has not been saved automatically. Adjust settings, try a stronger preset, choose another video, or explicitly select Save Anyway. Already-efficient files may have little room for improvement.
• Current support is up to 4K/60fps, one video track and at most one mono/stereo audio track. HDR is unsupported. Adjust codecs or choose another source when unsupported; wait for another video export such as flipping to finish.
• Processing is local and retains the original. Cancel discards encoding progress; interrupted jobs must restart. Successful outputs are in the app's Compression folder under system Movies.