2. There is something wrong with the playback source of the video. Open the link of the copied video in the browser to see if it can be played, or change the video to see if it is a video problem or a mobile phone problem.
3. Some mobile phones do not support the flash function. Download Flash player or use third-party video playback software.
4. The version of the software playing the video is too low. Update the software to the latest version before playing.
5. The mobile phone has too much cache and insufficient memory, which affects video playback. Go to the phone housekeeper, clean up the phone cache and lucky big files, and then restart the phone to see if it can resume normal playback.