I've always suspected video-gen is basically a loss leader for OpenAI, Gemini, and Grok. They can't convince the general population that AI is world-changing trillion dollar tech with "vibe coding", but realistic fake videos are impressive at a glance, and might convince many non-technical people that AI/LLMs are something revolutionary.
I think of them all Gemini has the most viable use case when Veo is paired with their advertising platform. It does genuinely open the door to a lot of cost saving for promo shots of products etc