[Misc] Update Readme for proper video paths

README.md

@@ -8,13 +8,11 @@
 **LiDAR Situational Graphs (S-Graphs)** is a ROS2 package for generating in real-time four-layered hierarchical factor graphs for single or multi-floor scenes. It reepresents a scene graph using 3D LiDAR which includes **_Keyframes_** registring the robot poses, **_Walls_** which map wall planes, **_Rooms Layer_** constraining the wall planes using 4 wall-room or 2 wall-room factors, **_Floors_** constraining the rooms within a given floor level. It also supports several graph constraints, such as GPS, IMU acceleration (gravity vector), IMU orientation (magnetic sensor). We have tested this package mostly with Ouster OS-1 and Velodyne (VLP16) sensors in structured indoor environments. 
 
 <p align="center">
-  <video width="600" autoplay loop muted controls>
-    <source src="./docs/imgs/main_building.mp4" type="video/mp4">
-    Your browser does not support the video tag.
-  </video>
+  <a href="https://youtu.be/wg0_VSo4iE8">
+    <img src="./docs/imgs/main_image.png" alt="Video Thumbnail" width="80%">
+  </a>
 </p>
 
-
 ## 📖 Published Papers <a id="published-papers"></a>
 
 <details >

docs/index.md

@@ -9,7 +9,12 @@
 
 **LiDAR Situational Graphs (S-Graphs)** is a ROS2 package for generating in real-time four-layered hierarchical factor graphs for single or multi-floor scenes. It reepresents a scene graph using 3D LiDAR which includes **_Keyframes_** registring the robot poses, **_Walls_** which map wall planes, **_Rooms Layer_** constraining the wall planes using 4 wall-room or 2 wall-room factors, **_Floors_** constraining the rooms within a given floor level. It also supports several graph constraints, such as GPS, IMU acceleration (gravity vector), IMU orientation (magnetic sensor). We have tested this package mostly with Ouster OS-1 and Velodyne (VLP16) sensors in structured indoor environments. This work is a fork of [hdl_graph_slam](https://github.com/koide3/hdl_graph_slam) which as previously in ROS1.
 
-![logo](./imgs/main_building.gif){align=center}
+<div align="center">
+  <video width="600" autoplay loop muted controls>
+    <source src="./imgs/main_building.mp4" type="video/mp4">
+    Your browser does not support the video tag.
+  </video>
+</div>
 
 ## 📖 Published Papers <a id="published-papers"></a>