A day before one of the biggest weekends on the service academy football calendar, take in a trio of tidbits about the biggest weekend: 1. Spirit spot contest. Need tickets for this year’s game? Have a decent video camera? You might be covered. The game’s official spirit spot video contest launched late last month. You can submit your video to armynavyfootballgame@gmail.com; a Go Army and a Go Navy winner each will receive four tickets, four on-field passes and a parking pass for the Dec. 12 showdown in Philadelphia. Not familiar with the genre? Click on some of our reviews from last year’s spots. The…