diff --git a/src/server.js b/src/server.js
index 1522f77a..beed5d34 100644
--- a/src/server.js
+++ b/src/server.js
@@ -217,11 +217,13 @@ function index(req, res, next) {
 	];
 
 	// If prefetch is enabled, but storage is not, we have to allow mixed content
+	// - https://user-images.githubusercontent.com is where we currently push our changelog screenshots
+	// - data: is required for the HTML5 video player
 	if (Helper.config.prefetchStorage || !Helper.config.prefetch) {
-		policies.push("img-src 'self' https://user-images.githubusercontent.com");
+		policies.push("img-src 'self' data: https://user-images.githubusercontent.com");
 		policies.unshift("block-all-mixed-content");
 	} else {
-		policies.push("img-src http: https:");
+		policies.push("img-src http: https: data:");
 	}
 
 	res.setHeader("Content-Type", "text/html");