Accomplishing that task does not require "writing a program". From recording your own audio, to presentation video etc, or using a voice-synth even, the problem doesn't demand such an involved solution as writing a program. If that guy was a programmer, he would know that. I call shenanigans.
He probably had elaborate exception handling done: what if the bride says, "No". What if he said no? What if someone in the audience speaks up instead of forever staying silent? What if the bride tripped on her dress and fell.... Seriously, there are an endless list of exceptional circumstances to consider, definitely worthy of a program!
You know, the difference between this company and the Titanic is that the Titanic had paying customers.