Android video repair
Android video repair: what it usually means
Android videos may fail after a camera app crash, low storage, SD card problems, USB transfer interruption, or cloud sync issue. The result can be a large MP4 that normal players cannot open.
If the file has real size, there may still be recoverable frames and audio inside. The safest first move is to leave the original untouched and create a separate repaired preview.
Do not trim, re-export, repeatedly convert, or overwrite the damaged file. If you need to experiment, work from a copy and keep the original exactly as it is.