I'm thinking of building a video prototype validation service—would you use it?

Problem: I spent 3 months building a feature nobody wanted.

Idea: Instead of MVPs, create 3-minute video prototypes to validate demand, then run surveys.

Target: Indie hackers who want to test features before coding.

Questions:

1. How do you validate ideas now?
2. Would you pay $500-1000 to avoid a failed MVP?
3. What would make you trust this service?

No product yet—just 2 conversations that said "I'd use it."

Looking for 3 more people to talk to before I build anything.