This is funny, though unfair:
It's unfair because the expected word error rate these days for isolated number-words, whatever the accent, is a few tenths of a percent; and also because even the worst-designed voice-response system would have better fall-back strategies than this one does.
The clip is from Burnistoun, "a critically acclaimed sketch show for BBC Scotland by the Scottish comedians Iain Connell & Robert Florence". The most linguistically-interesting thing in this clip is Scott and Peter's attempts to produce "eleven" in a variety of regional accents.
[Update -- Just to introduce a small note of reality into the discussion below, I tried playing the audio from the clip into Google Voice, using the "note to self" feature on my Droid, and holding the phone up to the speaker of my laptop. I went through the original rendition of "eleven", and the next eight copies, at which point I got bored and stopped. All nine performances were transcribed by the ASR system as "11".
This despite the fact that the system was obviously not primed to expect that the alternatives were limited to numbers or other words plausibly representing the floors of a building. The tallest building in Scotland appears to have 31 floors -- even if this is extended with basements and synonyms for various floors, a competently-designed speaker-independent system limited to 50 or so possibilities would hardly ever make a mistake, and would not be derailed by accents as transparent as those in this sketch.
ASR systems are of course far from perfect, but the public stereotype is very far from the truth.]
[Update #2 -- As long as we're in complaining-about-technology mode, I can't resist mentioning an annoying interactional quirk of the elevator in the building I live in. It has no speech technology at all, neither input nor output, so this was a quirk of its button-based communications system.
For several years, pushing "1" had the effect of making it deaf and blind to floors 2 and 3. If those floors had previously been depressed, the little lights in the center of their buttons went out, and no further attempts to press them would be registered, nor would the elevator respond to calls from those floors. The only way to restore the elevators willingness to admit that floors 2 and 3 existed was to take it all the way up to 4, then go back down to the basement and try again.]