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You might also consider 'reserving' some of your more exciting footage for special posts, that may be able to gain more viewers. Some folks hold contests with small monetary rewards, or for temporarily delegated stakes. One way to do that and bear the cost is to use the 50/50 rewards option and offer the SBD portion of the author rewards for that post as the prizes.

Given the value of your work, you may also be able to find sponsors, or others that want to support what you do. One thing I've seen here is a strong tendency towards libertarian thought (as I note everywhere early adopters/technical folk congregate on the web), and you are likely to gain much support from people who strongly support what you do.

I strongly support what you do!

Badderasser man! thank you!

For gaining support everything @valuedcustomer said is good, look for people talking about the same topics as you interact on their posts and they'll be sure to check you out.
Maybe a good pro-cop anti-cop debate would stir up a dust storm.