I think you demonstrate its current state well enough, but wording still affects how potential backers perceive your campaign. Poor wording sows seeds of doubt. People who aren't already into the idea might see that and stop reading there, and never even give the alpha a look.
Don't rely on the entire combination of everything you have (alpha, video, description, screenshots, etc) to sell your project to potential backers. Make every element good enough to do it on its own, as much as you can, because most people won't look at every single thing anyway. If something they look at happens to be weak, that could give them a bad impression of the whole campaign.
As for Pro, my issue is which features are behind the paywall, not that there is a paywall. Even if Pro ends up being free, you're likely scaring potential backers/users away by making it look like a lot of expected/basic features aren't part of the base app.
Overall, I think you're expecting people to care a little bit too much. Most people won't read your whole campaign description before deciding not to back you, they'll stop at the first thing that seems iffy to them. Heck, a lot of people won't even read the whole thing before deciding to throw money at you xP First impressions matter a lot.
