i like the idea and the website looks promising and well thought out (you should activate ssl though)

have you thought about adding incentives/funding for film makers? maybe through sponsorships from crypto companies.

tbf verifying is easier than typing out the whole thing.. only a portion actually, anything over maybe 5-6 characters would be too difficult for the website to compute a matching address. but yea it's unnecessary 3rd party risk and shouldn't be recommended to noobs with the current trust model.

to use multiple seeds you could just restore them every time you want to switch wallets