added video posters for slow video loading

index.html

@@ -67,7 +67,11 @@ <h1 class="ecosystem-title"> CARLA Ecosystem</h1>
                                     technology that <strong>safely anticipates human behavior</strong>.</p>
                             </div>
                             <div class="page-flex-item">
-                                <video class="iai-video" autoplay="autoplay" muted loop="loop"
+                                <video class="iai-video" 
+                                    autoplay="autoplay" 
+                                    muted 
+                                    loop="loop"
+                                    poster="./video/iai_video_poster.png"
                                     src="./video/iai-pipeline.mp4" playsinline=""
                                     style="margin: auto; display:block;"></video>
                             </div>
@@ -468,8 +472,12 @@ <h2>Real time RADAR</h2>
                             </p>
                         </div>
                         <div class="page-flex-item">
-                            <video class="iai-video" autoplay="autoplay" muted loop=""
-                                src="https://www.ptvgroup.com/sites/default/files/2023-08/ptvgroup-company-profile-header.mp4"
+                            <video class="iai-video" 
+                                autoplay="autoplay" 
+                                muted 
+                                loop=""
+                                poster="./video/ptv_video_poster.png"
+                                src="./video/ptvgroup-company-profile-header.mp4"
                                 playsinline="" style="margin: auto; display:block;"></video>
                         </div>
                         <div class="page-flex-item">