These are the "Mathematics He Wrote" opening titles from my Keyboard Calculations video:    • Why the longest English word is PAPAL...  

That awesome folder was hand crafted by Lisa Mathers.
Yet another remix of the SUM theme was done by Howard Carter.
The almost-shot-for-shot remake of the Murder She Wrote titles was directed by Alex Genn-Bash.

This video was actually released without explanation on my second channel about two hour before the main video. Which will explain some of the confused comments below.