At the top of the playlist is an export/email link (right below the “Edit Playlist” button). Click on it and it will take you to a page where you can specify which fields you want to download, the format, how you would like the data delivered, etc. Very handy and should do exactly what you’re looking to do.
You should be able to copy-paste from the HTML table displayed into a spreadsheet program like Excel or Google Sheets, then its easy to delete the stuff you don’t need.
Copy-pasting from table data from HTML to other programs has worked on Windows and Mac for a while now and can be very handy.
Forgot to mention: I downloaded the lengthy list with repeats. Then eliminated the duplicates with a command in Google Sheets. (Excel has a similar command.)
Less time than copying and pasting, but still long…