As Leo Wattenberg wrote, there are several ways to undo the changes.
I just reverted them as well as I could with some CSS and published it here as a userstyle: https://userstyles.org/styles/176683/berny23-s-youtube-enhancements
(You can use Stylish or any other userstyles/css addon for Firefox, Chrome, etc.)
I came across this service which claims to do exactly what I asked for:
Unfortunately on several videos I tried it didn't have the metadata. But perhaps someone else will be more lucky than me with their videos.
Go to ->
PLaylist Settings (of Favorites) -> Advanced Settings
Youtube allows you there fetch your list (Click read more). Save the list locally.
Code your utility that searches the HTML list to obtain URL and location.
Search extract for -> <tr with class="pl-video yt-uix-tile "
and attribute data-title= and anchor a href=.
p.s. I know, ...