Add Multiple Examples to Video Showcase

[vislupus]

This pull request includes the following updates:

• Replaced the image in an existing example to enhance clarity and visual appeal.
• Added a new example to provide additional context and better illustrate the concept.

These changes aim to improve the user experience by making the showcased content more engaging and informative.

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[vislupus]

Added more new examples to enhance the section and provide broader context.

[shiffman]

Hi @vislupus, apologies for the delay in reviewing this. So many wonderful examples and demos, I'm so impressed by your work! It looks like in a couple instances, the same sketch is submitted for multiple videos. Unfortunately the site doesn't really support this right now and rather than have duplicate entries I think it's best to pick the video that is "best suited" to each project. Does this make sense? Would you mind editing this pull request so each project is submitted only once?