Watch a few of their videos (non-wedding content as well, if available). Then search for a random wedding video by a few other filmmakers, or ask a friend for a link to their own. Every videographer and editor will have a unique creative footprint, you don't have to study their entire life’s work, or become a scholar of filmmaking, just take 15-minutes and see what people are doing and how their styles differ. Don’t hesitate to take some notes on anything that catches your eye, and share it with your videographer. Please keep your notes positive, you don't have to like everything an artist does, but thickness of skin will vary. What is of importance is that there is more you like than don't, otherwise you are talking to the wrong artist.
All the gear, preparation and creativity in the world will get you no where without light. This is literally the most important factor for videography. When a space lacks light, the cameras will not get a clean image, varying from some light grain in shadows, to an unsightly parade of noise. Talk to your videographer about their use of artificial lighting to keep the quality high; or you can discuss an option to sacrifice a degree of quality for a natural feel. Also keep in mind the options you have with your venues, it is your day, and if the video quality is important to you, talk to the venue managers about how many lights they keep on, and when/how dim they go. Some clients ask venues to keep full lights on up through their first dance. This will also help your photographer as well.
3. Audio track
Good audio is not just a matter of sound quality (that's our job to worry about), but on your end it is a question of the content. Will you read letters out loud during preparation coverage, is the officiant going to perform something poetically, and-
will one of your honorary guests, "slay" their speech? [cont.]
The best wedding videos will almost always have amazing dialogue narratives behind the images, don’t just assume this will happen if it is what you want out of your video. Poke around a bit, ask your speakers what they have planned, and challenge them to prepare and practice.
4. Social Media
I really enjoy participating in a couples day-of social media content. I don’t let it distract me during the big moments, but there is plenty of downtime to participate in some fun little pieces of #Wegotmarriedtoday, smart-phone content. If you value and appreciate this, or if you would absolutely detest it, let them know one way or the other.
This is a person you are inviting to document friends and family with HD cameras, microphones and zoom lenses. Have a conversation about this with your partner, as well as the videographer. You and your guests want to have fun and feel safe in their celebration. That security starts top-down with you two displaying a comfort and trust, and this first meeting is the time to establish this trust. The videographer shouldn’t feel like a stranger on your big day, he or she should feel like that one friend you have known just barely enough to place at the back corner table-11 reservation. I mean you won't know them that well, but it should feel and seem like you do for best results.
*These thoughts are based on my personal experience in wedding videography so-far. If you would like to comment a question, or submit any related thoughts or experiences on this subject (without naming names), feel free to do so.