revision:
The onwaiting attribute defines a script to run when the video stops because it needs to buffer the next frame. This event can also be used on <audio> elements, but it is mostly used for videos.
The onwaiting attribute is part of the event attributes and can be used on the following elements: <audio> and<video>.
<element onwaiting="script"></element>
script: this attribute contains single value script which works when the onwaiting event is called.
<video style="margin-left:3vw;" controls id="videoID" width="400" height="auto">
<source src="../../pics/Wuzhen-20-10_02.mp4" type="video/mp4">
</video>
<script>
document.getElementById("videoID").addEventListener("waiting", videoFun());
function videoFun() {
alert("start buffering");
}
</script>