Hi! I like that you're thinking in terms of niches - in your case, business owners > business coaches. I advise many SaaS businesses in the Bay Area, and the one-to-one model is mostly settled with current players, the big market is one-to-many or many-to-many.

In other words, position yourself as the one that un-bores the conference call. Get more done, multitask, clear voice, sharp pictures, no delay. That's what businesses need, anecdotally at least.

Next steps? Visit a few meetups, visit a few incubators, talk to real people. Ask them what frustrates them about videoconf's.
Take it slow, be real.

Would be exciting to hop on a call to chat more!