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Video and audio formatting specifications - YouTube Help
Common uploading errors - YouTube Help - Google Help
YouTube recommended upload encoding settings - Google Help
Supported YouTube file formats - Google Help
Add an audio track to your video - YouTube Help - Google Help
Use music and sound effects from the Audio Library - Google Help
YouTube でサポートされているファイル形式 - Google Help
Upload music to your YouTube Music library - Google Help
Troubleshoot YouTube video errors - Google Help
Download music & podcasts to listen offline - Google Help