Best way to get high-quality gym playlists for offline use?

Hey everyone! I’m looking for a way to save some of those 'Aggressive Phonk' or 'Epic Gym' mixes from YouTube to my phone. My gym is in a basement and the reception is absolutely zero, so streaming just isn't an option. Does anyone know a fast way to get these as MP3s without the quality being terrible?

Thanks!

I feel your pain, training without music is the worst. I usually prep my workout library at home before heading out.