JSFiddle - React, Tailwind, and code Playground

HTML

<!-- From first page: -->

<div class="button">
  <input class="changeSrc" type="button" name="bttn" value="Change video src!">
</div>

<!-- From second page: -->

<div class="videoplayer">
  <video class="video" src="videos/something.mp4" controls>
</video>

JavaScript

// From first page:


$('.changeSrc').click(function() {
  window.localStorage.setItem('changeSrc', 'yes');
});

// From second page:

var $status = window.localStorage.getItem('changeSrc');
if($status == 'yes'){
$('.video').attr('src', 'videos/new_src.mp4')
}