Don Pacifico It's made worse by the fact that it's going to be a really small wedding, so my absence would be noticed
Honestly I'd negotiate. Discreetly stream the match but make sure to stop and pay attention during the bride's walk, the ceremony and vows. Also during the bride and groom's speeches over dinner. Strictly do not get captured by any wedding photographer or videographer watching the footy.
Give the happy couple a properly thoughtful gift and words. Go a touch above and beyond with other gestures and courtesies to the in-laws. Pre-plan some deflective special gesture to your wife to validate her if she pops off at you. Don't even slightly disrupt any meaning-laden moments of the sacrament. You'll be right. π€
I mean, if we're actually in it I don't think you can skip it. Tell them you've waited 20 years for the moment .. .