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