And here's a script that restores independent scrolling functionality of the Youtube sidebar: gist.github.com/absurd/576d2...

This can be corrected with a browser extension that loads userscripts like Tampermonkey or Greasemonkey.

Here's the script I wrote for the sidebar width correction yesterday: gist.github.com/absurd/0da44...

Here's the fix I wrote for myself for use with greasemonkey/tampermonkey browser extension if you'd like to put it back the way it was. I eyeballed the width numbers but you can make it whatever you want: gist.github.com/absurd/0da44...

Put another way, is the logical converse of "Every time a bell rings, an angel gets wings" surjective within any given worldly reality, does the corresponding bell ringing happen in *some* reality but not necessarily anywhere in "this" one, or is the logical converse just not true?