chore: formalize video inclusion advice

Author: zlataovce

CONTRIBUTING.md

@@ -92,14 +92,15 @@ To maintain consistency and readability across the documentation, please adhere
 7. **Links and references**: When referencing external sources or linking to other pages, use descriptive anchor text and provide full URLs.
 
 8. **Images**: Include images if necessary to illustrate concepts, ensure the images are clear and relevant to the content, and store them in the repository rather than external CDNs (i.e. imgur).
+   - Including a video is also possible; however, it should be short and adequately compressed. If the video does not need interaction, e.g. pausing, using an animated image (GIF, WebP, ...) is preferred, as it grabs attention better (auto-play) and can be further optimized by the build tooling.
 
-9. **Format code**: After you've made changes, don't forget to run the formatting script with `pnpm run format`.
+10. **Format code**: After you've made changes, don't forget to run the formatting script with `pnpm run format`.
 
-10. **Keep it concise**: Write clear and concise sentences. Avoid unnecessary jargon and explanations.
+11. **Keep it concise**: Write clear and concise sentences. Avoid unnecessary jargon and explanations.
 
-11. **Be inclusive**: Be mindful of all readers and contributors. Use language that is inclusive and welcoming to everyone.
+12. **Be inclusive**: Be mindful of all readers and contributors. Use language that is inclusive and welcoming to everyone.
 
-12. **Capitalize Vanilla**: When referring to the base game, use "Vanilla" with a capital "V".
+13. **Capitalize Vanilla**: When referring to the base game, use "Vanilla" with a capital "V".
 
 ## Version tags