Build a great portfolio! Create a great demo reel and show your skills.
Network. Go out there and shake hands and have face-to-face time with potential customers and meet other production company videographers.
Use social media: Social media is one of the best ways to promote your video productions. It takes a lot of time and effort though, but it’s a great way to connect with potential customers. Engage with your clients and add some promotions in there.
Alway produce great quality. Making your client happy about the work you’ve accomplished should be your ultimate goal. If you do this, they’ll spread the word about you. There is no better marketing than former clients speaking highly of you and your work.
Teach underwater video. If you teach your skills, you show people that you know what you are doing.