Here is a similar list to @krateng's with additional ones and references to less known ones:

Sorted by latest

All videos of the category in latest descending order.

• UU - Everything: Videos + Shorts + Live
• UULF - Videos
• UUSH - Shorts
• UULV - Live

Popular

The 200 most popular videos of the category in descending order.

• PU¹ - Everything: Videos + Shorts + Live
• UULP - Videos
• UUPS - Shorts
• UUPV - Live

Members only

All exclusive member-only videos of the category in latest descending order.

• UUMO - Everything: Videos + Shorts + Live
• UUMF - Videos
• UUMS - Shorts
• UUMV - Live

Table summary:

Resources with other playlist URL patterns:

1. https://github.com/RobertWesner/YouTube-Play-All/blob/main/documentation/available-lists.md
2. https://wiki.archiveteam.org/index.php/YouTube/Technical_details

¹ Unviewable playlist: Cannot be directly be viewed in /playlist but works in /watch