Change the Video source with a button click

Hi 

I'm trying to dynamically change the source of a video with a button click. I have several videos to display and would love to be able the user to change them when needed. 

I have tried it with a normal button and a code element.

I have added code:

<script>
function changeVideoSource() {
  // JavaScript code to change the video source
  // For example:
  
  var video = document.getElementById('block-yui_3_17_2_1_1709155643233_4986');
  video.src = 'https://youtu.be/7m94ip38UKs?si=YEmrvTrkIkR6Zqgw';
 console.log('Video source changed Successfully:', video.src); 

  alert('Video source changed successfully!'); 
}

</script>

 <button onclick="changeVideoSource()">Change Video Source</button>

"Video source changed. Successfully: https://youtu.be/7m94ip38UKs?si=YEmrvTrkIkR6Zqgw"

 

But the source doesnt change.

Can you see any thing I'm doing wrong?

www.ocandc.com.au/self-care

You mean hover on each image >> Change video on left?