Put yourself in the recruiters shoes and think what kind of information they are trying to gather from aspiring pilots. The video interview is a good method as aside from the information you provide it's also testing some key pilot skills - communication, information processing, thinking on your feet, working and remaining calm under pressure. All in a time constrained environment.
Well said - this is exactly the benefit of a video interview over the same questions in essay form. (Much more entertaining for the assessors too!)