Video won't play here? .
Open the video in a new tab, press Capture audio below, pick that YouTube tab with “Share tab audio” ticked, then play the video. Press Stop when it ends.
Open video in a new tab ↗Format
Quality
Real-time capture. Recording plays the video through
in real time (a 4-min song takes ~4 min) and re-encodes the audio from
playback, so quality is capped by what YouTube streams — not the
original master. For personal use; downloading is against YouTube's
Terms of Service.