Update README with new link and video information

Updated the README with a new link and added a video description.

Author: ruili-testsprite

README.md

@@ -34,7 +34,11 @@ AI ships code in minutes — verifying it hasn't. `testsprite` opens your live a
 
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-https://github.com/user-attachments/assets/ab3105d5-4d5c-4a7b-b639-610f80fddc0e
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+https://github.com/user-attachments/assets/eca90a91-93ef-49f6-8d13-86b4eb25f4cf
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 <p align="center"><sub><b>▶ Watch the launch video</b> — the three hard limits every coding agent hits, and the loop that breaks them (4 min).</sub></p>