Granted it is easy to lose track of time watching videos on YouTube when you have a reliable Internet connection. However, if you need to be offline but still want to enjoy playlists, user channels or a new artist, then rest assured that you can use tools such as Free YouTube to MP3 Converter and grab the audio from your favorite YouTube content.

Convert YouTube to MP3. Fast. Free. The Best!
Download original quality files without conversion.
Get Insane and Extreme MP3 hi-fi files, nobody does it, but we!
Convert to AAC, OGG, M4A, FLAC and WAV lossless audio.
Convert any YouTube playlist to MP3.

Bulk download
Get the whole world of MP3s. Find playlists and channels to match your mood. Download and convert YouTube Playlist to MP3. This is the unique feature of the program.

Pure sound
Convert to lossless and lossy. Formats available: MP3 (Lame Insane and Extreme Profiles), M4A (AAC), WAV, FLAC and OGG. Download the original stream to get hi-fi sound within the reach of the audiophile.

Functional
Enjoy multithreaded downloading. Download playlists and separate links - all at once. Customize output names easily. Fill MP3 tags and artworks automatically.

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https://www.virustotal.com/gui/file/2779105bb0f211633ba8527507ab4f28ae8c796bd14652cf335e82c9b2e42e3c