diff --git a/assets/sass/_theme/blocks/video.sass b/assets/sass/_theme/blocks/video.sass
index f7b9fddcfdf405b4a386e8a19e2b5faaa9a9ad6c..8d698116f2713e268738d92c5531b39421055d20 100644
--- a/assets/sass/_theme/blocks/video.sass
+++ b/assets/sass/_theme/blocks/video.sass
@@ -2,7 +2,8 @@
     .video
         @include aspect-ratio(16/9, 'iframe')
         @supports not (aspect-ratio: 1)
-            iframe
+            iframe,
+            img
                 min-height: 400px
         position: relative
         &-player
@@ -22,6 +23,7 @@
                 width: 100%
                 height: 100%
             img
+                object-fit: cover
                 z-index: 1
             &::after
                 content: ''
diff --git a/layouts/partials/blocks/templates/video.html b/layouts/partials/blocks/templates/video.html
index 072a837a1f374f9146633868b97fccd9dafaaa10..6a33257b08a80b4a8debbff4684c654e263db6df 100644
--- a/layouts/partials/blocks/templates/video.html
+++ b/layouts/partials/blocks/templates/video.html
@@ -16,7 +16,10 @@
             <div class="video">
               <div class="video-player">
                 <button class="video-player__play" title ="{{- i18n "blocks.video.play" -}}" aria-label="{{- i18n "blocks.video.play" -}}"></button>
-                <img src="https://img.youtube.com/vi/XEEUOiTgJL0/hqdefault.jpg" alt="">
+                <picture>
+                  <source srcset="https://osuny-1b4da.kxcdn.com/g1qn3b0yvdg2t0wosq059xocpyq1?format=webp&width=1800&height=0&&fit=inside&quality=50" type="image/jpg" />
+                  <img src="https://osuny-1b4da.kxcdn.com/g1qn3b0yvdg2t0wosq059xocpyq1?format=webp&width=1800&height=0&&fit=inside&quality=50" alt="" />
+                </picture>
               </div>
               {{ $url := .url}}
               {{ if strings.Contains $url "vimeo" }}
diff --git a/layouts/partials/head/csp.html b/layouts/partials/head/csp.html
index 8f7ac79c9f28fb5ef65aac2beb2f90b4e93e0092..de1b2d9420f69d64cc252834bb4d1a716339b2f9 100644
--- a/layouts/partials/head/csp.html
+++ b/layouts/partials/head/csp.html
@@ -1,5 +1,5 @@
 {{- with site.Data.website.external_domains -}}
-<meta http-equiv="-Content-Security-Policy"
+<meta http-equiv="Content-Security-Policy"
       content="
         default-src 'self' {{ delimit . " " }}
         {{ if not hugo.IsProduction }}'unsafe-inline'{{ end }}