Almost all the recent official videos that were released — both for G5 and several G4 ones — have used this font for thumbnail titles and in-video typography. I don't recognise it, and WhatTheFont doesn't give any close match either.

It's an all-caps type, with the exception of the letters "e", "i", and "y". The upper case is identical to the lower case, except for the letters "M", "P", and "R" which have additional flourishes. And for maximum vexation, no example of the letter "X" exists to date.

Before I try my hand at vectorising the letters and making an opentype font, I thought I'd ask whether anyone else knows this font or if it's custom made.