If you see a copyright claim on your video after uploading it to YouTube, this is usually related to Content ID – an automatic content recognition system.

A Content ID claim does not mean that you violated copyright laws.
It means the system has matched a part of your video (usually audio) with the content registered by a copyright holder.

Start here

Before changing any settings:

1. Play the converted file in another media player (for example, VLC).
2. Check whether the original file is in sync in the program preview.

This helps determine whether the issue occurs during conversion or is already present in the source file.

Case 1: The original file is in sync, but the converted file is not

Step 1: Disable hardware acceleration

This usually indicates an issue related to hardware acceleration or output format settings.

If the issue persists:

1. Open the output format settings.
2. Click the Settings (cogwheel) button.
3. Select different video and audio codecs. For example .mp4, set Video Codec to MPEG-4, and Audio Codec to MP3, or AAC.
4. Apply the changes.
5. Convert the file again and check sync in the new output file.

Using widely supported codecs may improve stability.

If the desync appears in the program preview before conversion, the issue may be related to:

• the source file itself
• system performance
• outdated drivers (Windows).

What to doWindows

• Update your graphics drivers.
• Restart the computer after updating.
• Reopen the program and test again.

For step-by-step instructions, see: How to update graphics card drivers
macOS

• Close unnecessary applications.
• Make sure system resources are not heavily used.
• Restart the Mac and test again.