diff --git a/core/core.js b/core/core.js
index 90bc8a49..0aebe122 100644
--- a/core/core.js
+++ b/core/core.js
@@ -508,6 +508,9 @@ function sendData(response, data, type, headers) {
 		} else if (startsWithBytes(data, [null, null, null, null, 0x66, 0x74, 0x79, 0x70, 0x6d, 0x70, 0x34, 0x32])) {
 			response.writeHead(200, Object.assign({"Content-Type": "audio/mpeg", "Content-Length": data.byteLength}, headers || {}));
 			response.end(data);
+		} else if (startsWithBytes(data, [null, null, null, null, 0x66, 0x74, 0x79, 0x70, 0x69, 0x73, 0x6f, 0x6d])) {
+			response.writeHead(200, Object.assign({"Content-Type": "video/mp4", "Content-Length": data.byteLength}, headers || {}));
+			response.end(data);
 		} else {
 			response.writeHead(200, Object.assign({"Content-Type": type || "text/javascript; charset=utf-8", "Content-Length": data.byteLength}, headers || {}));
 			response.end(data);