diff --git a/bricks/utils.js b/bricks/utils.js
index ce9610e..08dfa3a 100644
--- a/bricks/utils.js
+++ b/bricks/utils.js
@@ -22,8 +22,8 @@ event:
 	domoff: remove from dom
 */
 bricks.dom_on_off_observer=new MutationObserver((mutations)=>{
-	for (let mutation of mutations) {
-		for (let n of mutation.removedNodes) {
+	for (let m of mutations) {
+		for (let n of m.removedNodes) {
 		  	if (n.bricks_widget){
 				var w = n.bricks_widget;
 				w.dispatch('domoff');
diff --git a/bricks/videoplayer.js b/bricks/videoplayer.js
index e41ff65..bc4bea8 100644
--- a/bricks/videoplayer.js
+++ b/bricks/videoplayer.js
@@ -1,4 +1,11 @@
+
 var bricks = window.bricks || {}
+/*
+use hls to play m3u8
+ https://cdn.jsdelivr.net/npm/hls.js@latest
+use dash to play dash
+  https://cdn.dashjs.org/latest/dash.all.min.js
+*/
 
 bricks VideoPlayer = class extends bricks.VBox {
 	constructor(opts) {