Eclipse, Insanity! is a workout video. It takes 60 days but gets you into great shape.
As an aside, I don’t think you should attempt to lose weight for shidduchim purposes unless you truly plan to keep it off once you are married/have kids. You want your husband to love you for who you are at all times, and if the 10-15 lbs will matter that much to him now they will matter then too.