Great points! I considered about the video call possibilities. The Berrics already made a Battle at the Quarantine video series with just basic video calls. The one try policy should be real time and video call does it just okay. I don't like reinventing the wheel. That's why I tweaked the rules a bit.
In this app, you have endless tries on every trick. Basic idea is to send difficult tricks and opponent has couple days time to learn them and reply.
I'm planning on game mode that allows only one try, just like in regular S.K.A.T.E. It could be implemented like putting the in-app camera on, camera films for the next 30 seconds and sends the clip automatically. That leaves user no possibility to cheat (hopefully).
That's still in planning phase. The apps has been released couple days ago and will be updated a lot based on feedback.