fix: remove video poster attribute to prevent image flash

Former-commit-id: d06c22c2b6d144eddff379b693fc2e080dd4c64e

components/blocks/HeroVideo.tsx

@@ -46,7 +46,6 @@ export function HeroVideo(props: HeroVideoProps) {
         <video
           className="absolute inset-0 w-full h-full object-cover z-1 pointer-events-none filter contrast-125 saturate-110 brightness-90"
           src={videoUrl}
-          poster={posterSrc}
           autoPlay
           muted
           loop

components/providers/InitialLoader.tsx

@@ -44,7 +44,7 @@ export function InitialLoader({ shouldShowLoader = true }: { shouldShowLoader?:
 
   const finishLoading = () => {
     // Set a session cookie so the server knows not to render the loader again
-    document.cookie = "etib_initial_load=true; path=/; samesite=lax";
+    document.cookie = "etib_initial_loader_v3=true; path=/; samesite=lax";
     setIsLoading(false);
   };