[VideoOverlay] Fix adding css classes (#5785)

* fix VideoOverlay css classes

* fix eslint errors

src/core/Util.js

@@ -58,7 +58,7 @@ export function stamp(obj) {
 	/*eslint-disable */
 	obj._leaflet_id = obj._leaflet_id || ++lastId;
 	return obj._leaflet_id;
-	/*eslint-enable */
+	/* eslint-enable */
 }
 
 // @function throttle(fn: Function, time: Number, context: Object): Function

src/dom/DomUtil.js

@@ -223,7 +223,7 @@ export function setPosition(el, point) {
 
 	/*eslint-disable */
 	el._leaflet_pos = point;
-	/*eslint-enable */
+	/* eslint-enable */
 
 	if (Browser.any3d) {
 		setTransform(el, point);

src/layer/VideoOverlay.js

@@ -39,8 +39,8 @@ export var VideoOverlay = ImageOverlay.extend({
 		var wasElementSupplied = this._url.tagName === 'VIDEO';
 		var vid = this._image = wasElementSupplied ? this._url : DomUtil.create('video');
 
-		DomUtil.addClass('leaflet-image-layer');
-		if (this._zoomAnimated) { DomUtil.addClass('leaflet-zoom-animated'); }
+		DomUtil.addClass(vid, 'leaflet-image-layer');
+		if (this._zoomAnimated) { DomUtil.addClass(vid, 'leaflet-zoom-animated'); }
 
 		vid.onselectstart = Util.falseFn;
 		vid.onmousemove = Util.falseFn;

src/map/Map.js

@@ -708,7 +708,7 @@ export var Map = Evented.extend({
 		} catch (e) {
 			/*eslint-disable */
 			this._container._leaflet_id = undefined;
-			/*eslint-enable */
+			/* eslint-enable */
 			this._containerId = undefined;
 		}