It seems that everything you are describing can be accomplished with the combination of Captivate Prime and Adobe Connect. We are not Prime resellers, we create Headless LMS's with Prime and assist organizations in acclimating Prime and Connect into their eco-systems and workflows. I'd be happy to walk through a scenario you have in mind and see what can be done to meet your vision. If your vision is workable, I'd be happy to recommend a reseller who can further assist you.
Feel free to contact me at firstname.lastname@example.org.