Ive made a bookmarlet for this:
1.make a new bookmark
2.set its url to this:
javascript:var%20%24jscomp%3D%24jscomp%7C%7C%7B%7D%3B%24jscomp.scope%3D%7B%7D%3B%24jscomp.createTemplateTagFirstArg%3Dfunction(a)%7Breturn%20a.raw%3Da%7D%3B%24jscomp.createTemplateTagFirstArgWithRaw%3Dfunction(a%2Cb)%7Ba.raw%3Db%3Breturn%20a%7D%3B(function()%7Bvar%20a%3Ddocument.getElementById(%22main-panel%22)%3Ba%26%26(a.style.display%3D%22none%22%3D%3D%3Da.style.display%3F%22%22%3A%22none%22)%3Bdocument.querySelectorAll(%22.content.ytmusic-player-page%22).forEach(function(b)%7Bb.style.padding%3D%220px%22%3D%3D%3Db.style.padding%3F%22%22%3A%220px%22%7D)%3Bdocument.querySelectorAll(%22ytmusic-player-queue-item%22).forEach(function(b)%7Bb.style.borderTop%3D%221px%20dotted%20black%22%3D%3D%3Db.style.borderTop%3F%22%22%3A%221px%20dotted%20black%22%7D)%3Ba%3Ddocument.getElementsByTagName(%22ytmusic-player-page%22)%3B0%3Ca.length%26%26(a%3Da%5B0%5D%2Ca.classList.contains(%22customToggle%22)%3Fa.classList.remove(%22customToggle%22)%3Aa.classList.add(%22customToggle%22))%3Bdocument.getElementById(%22customToggleStyle%22)%7C%7C(a%3Ddocument.createElement(%22style%22)%2Ca.id%3D%22customToggleStyle%22%2Ca.innerHTML%3D%22%5Cn%20%20%20%20%20%20%20%20%20%20%20%20.customToggle%20%7B%5Cn%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20--ytmusic-player-page-content-gap%3A%200px%20!important%3B%5Cn%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20%20--ytmusic-player-page-side-panel-width%3A%20100%25%20!important%3B%5Cn%20%20%20%20%20%20%20%20%20%20%20%20%7D%5Cn%20%20%20%20%20%20%20%20%22%2Cdocument.head.appendChild(a))%7D)()%3Bvoid+03.save and put it in the bookmark toolbar
press the bookmark While listening to a song on youtube music
when you want to remove video
press it again to go back to normal
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This is a toggle bookmarklet that allows you to remove the video
by hiding styles for a no distraction expiernce
(this will unfortunatlly remain to take video bandwidth as it hides
and does css changes instead of extracting the audio)
NOTE: that you may want to play with the browser zoom level to get it
just right :)