component.Video: handleAutoplay() => redundant update() call

If I see it correctly, handleAutoplay() only gets called inside construct(). If so, the method needs the @protected flag.

It is using this.update() before changing the value of the playing config, which itself also triggers an update() call.

We really want to batch all changes into one update() call instead => removing it inside handleAutoplay() would be sufficient.

Rationale: update() sends the vdom & vnode on a workers roundtrip to get the deltas. While this is happening, the component locks itself for future updates until the new vnode got back (async). After the delay the framework would trigger a 2nd roundtrip to get the deltas for the visible node.