YouTube mp3 is closed but there are alternatives -
2023 Updated] Top 6 Ways to Download YouTube Music to MP3 | Sidify
Download YouTube MP3 on Any Android or iOS Device
How to Convert YouTube Videos to MP3 Format - GadgetMates
YT MP3 Music & Video Downloader - Official app in the Microsoft Store
Free YouTube to MP3 Tool | YouTube MP3 Conversion Tool
Youtube to MP3 Converter Free – Get this Extension for 🦊 Firefox (en-US)
Easily and Efficient Way to Convert YouTube Video to MP3
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Everything You Need to Know About Converting YouTube Videos to MP3: From the Best Converters to Legal Considerations - Neon Music - Digital Music Discovery & Showcase Platform