What's the best way to automate a webinar?

I'm just stymied by looking for the best tool to automate my webinars. What I need:

- integrate powerpoint, video and audio to create a replayable mp4

- offer attendants an original time to listen and replay times to listen

- offer pops up at the right time in the presentation

I don't use wordpress and would rather have a one time fee. Right now, I use instant teleseminar and while they did recently add a video feature, it's off youtube and is slightly delayed. Plus anyone on the phone just HEARS SILENCE when the video is playing - no bueno

I just want to completely automate the presentation so it plays without me being there and ONLY offers replay when people sign up for a time slot

I've explored:

Stealth Seminar - kind of expensive, recurring and they don't tell you how it works until you pay

Webinar Jam - just an overlay for Google Hangouts which require more tech savvy to join than my audience has. My audience is not going to want to install software nor figure out how to join a google hangout

Go to Webinar - software to install for participants - not good

Anyone have any good clues? This is primarily for marketing purposes - free presentation to foster signups for a course (or later a product purchase)

Thank you!