1. This is because the third-party app has occupied the audio focus, which caused the video to be paused automatically.
2. Check if your phone has installed some video apps recently
3. ColorOS 5.2 and above: [Settings] > [App Management] > [Installed] > Check if the application is installed.
If you did install some suspicious third-party video player, then it is suggested you to uninstall it and download another official one in Google Play Store.
* Pictures, settings and paths might differ from those of your phone, but that do not affect the description in this article.
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