HDR

• https://hdrihaven.com/

Textures

• https://texturebox.com/
• https://www.poliigon.com/

Models

• https://sketchfab.com/3d-models

8K videos

• https://www.youtube.com/watch?v=1La4QzGeaaQ
• https://www.youtube.com/watch?v=7k2uKb9vCOI

4K videos

• “Spring” (Blender)