interview starts at 6:57
https://www.youtube.com/watch?v=y33_vbxDwUk
There is also a ROT18 cipher where letters and #'s are encoded (36 characters).
example : filename of Q's 7/4 pic as a ROT18 cipher:
>DcxDiKFW4AAJLLC.jpg
QpkQvXSJ9NNWYYP.jpg
Note that this is distinct from the ROT-n cipher where only letters are encoded (26 characters).
in this case, R is "rotated" or shifted 18 places in the alphabet to = J.
https://members.quicknet.nl/nj.vandompselaar/files/prive/converter_for_rot_5_13_18_47.html
Not mine. There's multiple converters available online.
Best to verify results with a couple others as some converters give funky results.