getting work as a legal videographer

[fred]

I am a videographer and am wondering about going through the CLVS cert. process and adding the ability of providing legal video documentation to my business. My business questions are how much marketing will I need to get my foot in the door? Or do must larger law firms have employees on staff that provide this service? Is there work in this field for a "freelancer". I noticed there are two certification organizations one the NCRA (National Court Reporter Assoc.) and the second being the AGCV (American Guild of Court Videographers) are there reasons to go with one verses the other?

Any additional insights would be very helpful.

Thanks, Fred