Driving a full logic tapedeck and a VFD off an Atmega

I love tapes. And I couldn't let a virgin car radio cassette mechanism go to waste. And I also love VFDs (Vacuum Fluorescent Display). And I always wanted to drive them from a microcontroller.
So if you're into Arduino programming and want to know how to drive a VFD, this one is for you. (although it's still a bit light on details - I'm very likely gonna update the project page on my homepage with more schematics and diagrams, it'll still be German, but you don't really need a language to understand I/O diagrams)
The history behind this video is - there's an article on Hackaday where someone built his own tape deck (he even made his own heads!). I built this just a few months ago, so I put my project in the comments. And from the replies, the people really liked it and wished for more info and for it to be in English (understandable - Google saugt immer noch Übersetzen - that's what happens if you translate "Google Translate still sucks". One correct translation btw. is "Google Translate stinkt immer noch ab")
So well this is a junk drawer build.

0:00 Intro
0:35 Reverse-engineering the mechanism
2:26 Many buttons on one pin
4:38 Demonstrating the mechanism
6:17 Many buttons continued - debug code
8:32 Analog / PSU section
9:18 Playing a tape
10:32 Auto reverse
11:20 Driving the VFD
14:12 Schematics time
15:33 here have code
19:34 waffling away / outro