Fix: Remove conflicting blurDataURL from HeroVideo and fix ReferencesSlider syntax error

components/blocks/HeroVideo.tsx

@@ -39,7 +39,6 @@ export function HeroVideo(props: HeroVideoProps) {
 
   const posterSrc = props.backgroundImage?.url || props.posterImage?.url || data?.posterImage?.url || defaultPoster;
   const posterAlt = props.backgroundImage?.alt || data?.posterImage?.alt || "E-TIB Gruppe Baustelle";
-  const blurDataURL = (placeholders as Record<string, string>)[posterSrc] || undefined;
 
   const ctaLabel = props.ctaLabel || props.linkText || data?.ctaLabel || 'Unternehmen entdecken';
   const ctaHref = props.ctaHref || props.linkHref || data?.ctaHref || '#unternehmen';
@@ -91,8 +90,6 @@ export function HeroVideo(props: HeroVideoProps) {
         className="object-cover z-[1] pointer-events-none filter contrast-125 saturate-110 brightness-90"
         sizes="100vw"
         priority
-        placeholder={blurDataURL ? "blur" : "empty"}
-        blurDataURL={blurDataURL}
       />
 
       {/* Render video on top if available, but defer src to avoid blocking LCP */}