diff --git a/client/metatags.lua b/client/metatags.lua
index 8cf83ebd..6826a13e 100644
--- a/client/metatags.lua
+++ b/client/metatags.lua
@@ -79,6 +79,9 @@ elseif ngx.var.request_uri_path:match('^/post/([0-9]+)/?$') then -- Post metadat
       add_meta_tag("twitter:image", ngx.var.external_host_url .. '/' .. post_info.contentUrl)
     elseif post_info.type == "video" then
       og_media_prefix = "og:video"
+      add_meta_tag("twitter:card", "player")
+      add_meta_tag("twitter:player:width", post_info.canvasWidth)
+      add_meta_tag("twitter:player:height", post_info.canvasHeight)
       -- some sites don't preview video, so at least provide a thumbnail
       add_meta_tag("og:image", ngx.var.external_host_url .. '/' .. post_info.thumbnailUrl)
     end
diff --git a/client/nginx.conf.docker b/client/nginx.conf.docker
index 4f36a8b2..b4c63e7e 100644
--- a/client/nginx.conf.docker
+++ b/client/nginx.conf.docker
@@ -110,8 +110,12 @@ http {
 
         location /_meta_tags_html {
             internal;
+            set $original_scheme $scheme;
+            if ( $http_x_forwarded_proto = 'https' ) {
+                set $original_scheme "https";
+            }
             root /var/www;
-            set $external_host_url "${scheme}://${http_host}";
+            set $external_host_url "${original_scheme}://${http_host}";
             content_by_lua_file /etc/nginx/metatags.lua;
         }