Hard time figuring out what the actual problem I am solving is. Could use feedback.

I don't use stories myself, so I can't speak to the pain points for story creators. The "mini-series" idea, is that distinct from how stories are normally made or published? If so, you could play that up.

(The advice that follows assumes you're pitching to an individual -- like a personal trainer who sells supplements or a lifestyle vlogger who does sponsored posts, etc. It may not be as helpful if you're aiming for the marketing assistant at a small corporate who's told "make us relevant on social media".)

Nice-looking demo page. I assume the idea is to use a laptop/desktop to edit content intended for phones? In that case, you might consider replacing the current tagline with something more like "The quick and easy way to create video stories for social" (since "quick and easy" is your differentiator versus the Adobe products). You could include a screenshot of the editing window with a brief animation of some action involving the mouse pointer, since most visitors probably won't make it to the Demo page.

Speaking of the demo, you might want to sell it harder, maybe with a louder, larger button that says, in effect, "See how easy it is right now!" or something, as "Demo" and even "Free Demo" may come off a little dry for your intended users. I'd re-word "SIGN UP TO GAIN EARLY ACCESS." as "GET EARLY ACCESS" or something friendlier (and no period at the end). For the placeholder, I'd replace "Enter Email" with something slightly whimsical like "instafluencer@example.com". And instead of "Request Invite" something like "Notify Me When It's Ready".

The second animation card could be confusing -- it took me a few seconds to realize you were describing a feature (speech to text) of your product rather than just showing a snippet of content built with the app.

The landing page itself should probably be organized so that your demo animations are at least partially visible on mobile right away, i.e. nearer the top of the page. You could do that with less copy, less padding around that div, or by putting the signup stuff in a separate div after the demo animations. Speaking of those, it would be good to have a stronger hint that they're meant to be swiped...maybe small dots or short horizontal bar indicators underneath. Or maybe a subtle drop shadow above or a faint translucent background behind the div containing the videos.