update link to video

README.md

@@ -11,6 +11,7 @@ This is the official implementation of [**WHAC: World-grounded Humans and Camera
 <div align="center">
     <a href="https://wqyin.github.io/projects/WHAC/" class="button"><b>[Homepage]</b></a> &nbsp;&nbsp;&nbsp;&nbsp;
     <a href="https://github.com/wqyin/WHAC" class="button"><b>[Code]</b></a> &nbsp;&nbsp;&nbsp;&nbsp;
+    <a href="https://youtu.be/J-g4sol6J1s" class="button"><b>[Video]</b></a> &nbsp;&nbsp;&nbsp;&nbsp;
     <a href="https://www.ecva.net/papers/eccv_2024/papers_ECCV/papers/04945.pdf" class="button"><b>[Paper]</b></a> &nbsp;&nbsp;&nbsp;&nbsp;
     <a href="https://arxiv.org/abs/2403.12959" class="button"><b>[arXiv]</b></a> &nbsp;&nbsp;&nbsp;&nbsp;
     <a href="https://github.com/wqyin/SMPLest-X" class="button"><b>[SMPLest-X]</b></a> &nbsp;&nbsp;&nbsp;&nbsp;