Write ideas in a notebook for a wedding proposal movie. Think about the format in which you're making your wedding proposal and what sort of ideas might be original and memorable. Maybe you could record a wedding proposal movie of you being interviewed on a talk show, culminating in a question from the interviewer that gives you the opening to ask the question. Maybe you could do a proposal take on a scene from your partner's favorite movie. There are numerous creative ways to shoot a wedding proposal.
Plan the proposal you want to turn into a movie. If the proposal movie involves any other people, any special props, or a reservation somewhere, be sure all of those elements are in place before you record the movie. Notify all parties that will be involved in the proposal movie of specific dates and times.
Shoot the wedding proposal with any digital recorder you can afford. Try to find a well-lit location to make your wedding proposal movie as bright as possible. Whatever scenario you choose as the basis for your wedding proposal, be sure you're the focus of the movie. Try to save the proposal for the end of the movie, and try to keep it a surprise. This means making a movie that doesn't hint at marriage until the end.