FOUR SPELLS THE ALPHABET (soundboard video)

Press keys to make Four from BFB spell out anything in the English alphabet! (It's easiest on a desktop browser.)
For 2-key letters, press the first key THEN the second key, as fast as you can.
For example, press "2+J" then "2" then "0+L" then "3" to say "BFDI".
Background drawn by TopHatTheHat!
Music ("Fig Leaf Times Two") by Kevin MacLeod (incompetech.com), licensed under the Creative Commons: By Attribution 3.0 license (creativecommon....
• Kevin MacLeod: Fig Lea...
Curious about the technical details? Here's a bit of me rambling!
So, this video is 75 seconds long. That means each tenth of the video is 7.5 seconds, which is, interestingly, not an integer. That means pressing '1' lands you on 0:07.5, '2' lands you on 0:15.0, '3' lands you on 0:22.5, and so on. That's a bit annoying: some event's timestamps ARE NOT INTEGERS! Very annoying.
Why did I choose this? Well, I wanted most of the events to happen equally distantly. (This makes it more pleasant to watch passively.) Also, pressing 'J' and 'L' always move you forward or backward 10 seconds (that is non-negotiable). Realizing this, the distance between two audio clips would have to be a divisor of 10. (e.g., 1, 2, 2.5, 3.33..., 5, 10.) Spacing them out every 2 seconds would have worked, but it felt too fast (you barely have any time before the next letter starts playing.) 5 seconds felt too slow (the video becomes 2:30 long.)
3.3333 seconds also sounds like it might work at first, but it doesn't. That's because, if the 10x3=30 events are each 3.333 seconds apart, that would be a 100-second-video. With 100 seconds, pressing a number key OR pressing 'J' or 'L' move you exactly by 10-second intervals. Meaning, you'd never get to escape from the 0,10,20,30 sequence and hit times like 3.333, 6.666, etc.
Also, you may wonder: Why are there a few instances of "next letter paused for mathematical reasons"? Well, there is no way to jump to 2.5 seconds with any combination of a number key (multiple of 7.5) and letter key (multiple of 10). I could go deeper into the math of why this is, but the simple answer is that it's because you can't go past the boundaries of the video (before the start or after the end).
Here's a Google spreadsheet of me experimenting with the timings of the events: docs.google.co...