Act as an AI video industry researcher and prompt engineering expert

Act as an AI video industry researcher and prompt engineering expert. Conduct a deep analysis of the current AI video ecosystem (Kling, Veo, Runway, Pika, Hailuo, Seedance, Luma, etc.).

My goal is not to find random prompt collections. I want to discover the highest-quality resources used by professional AI filmmakers and creators to produce cinematic, commercial, and viral videos.

Please identify:

The best websites, marketplaces, communities, Discord servers, GitHub repositories, and private libraries that contain high-quality AI video prompts, cinematic shot templates, storyboard templates, camera movement presets, advertising scenes, and reusable prompt frameworks.

Which resources are actually used by professional creators rather than beginners.

Hidden or lesser-known resources that are difficult to find through a normal Google search.

Websites where people share successful prompts together with the generated videos.

Libraries of proven templates for:

commercials

product ads

fashion

cinematic scenes

documentaries

horror

comedy

viral TikTok/Reels/Shorts

image-to-video workflows

consistent characters

Resources containing:

camera movement templates

cinematic lighting setups

lens presets

shot composition examples

storyboard libraries

movie shot databases

advertising references

Paid resources worth buying and why they are worth the money.

Free resources that provide the highest value.

If you had a budget of $500, how would you spend it to build the best possible AI video prompt library?

Rank the top 20 resources from best to worst, considering:

quality

uniqueness

usefulness for AI video generation

update frequency

value for money

I don't want generic recommendations. I want resources that professionals actually use to create cinematic AI videos at the highest level. Think like an experienced AI filmmaker who has tested hundreds of tools and communities. Provide direct links whenever possible and explain why each resource deserves its ranking.