I have a videosphere that shows up locally, but pushing it to gh-pages, the video doesn't show.
There's no 404 error that the file is not there and I am using git LFS for the mp4 video (it's a 360 video, so quite large).
https://github.com/ybinstock/GreatEscape360
<html>
<head>
<title>Great Escape</title>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
<meta name="mobile-web-app-capable" content="yes">
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<meta name="viewport" content="width=device-width,initial-scale=1,maximum-scale=1,shrink-to-fit=no,user-scalable=no,minimal-ui">
<script src="https://aframe.io/releases/0.4.0/aframe.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
</head>
<body>
<a-scene>
<a-assets>
<video id="greatescapevideo" autoplay loop="true" src="video2.mp4"> </video>
<img id="logo" src="logo.png">
<img id="slide1" src="slide1.png" >
<img id="slide2" src="slide2.png" >
<img id="slide3" src="slide3.png" >
<img id="slide4" src="slide4.png" >
<img id="slide5" src="slide5.png" >
</a-assets>
<a-camera wasd-controls="enabled: false"> </a-camera>
<a-videosphere src="#greatescapevideo"></a-videosphere>
<a-image id="logo" class="logo" src="#logo" position="0 2 -2" rotation="0 0 0"></a-image>
<a-image id="logo" class="logo" src="#logo" position="1 2 2" rotation="0 180 0"></a-image>
<a-image id="logo" class="logo" src="#logo" position="-2 2 0" rotation="0 90 0"></a-image>
<a-image id="logo" class="logo" src="#logo" position="2 2 0" rotation="0 -90 0"></a-image>
<a-image id="slide1" class="slide1" src="#slide1" position="0 2 -2" rotation="0 0 0" ></a-image>
<a-image id="slide1" class="slide1" src="#slide1" position="1 2 2" rotation="0 180 0" ></a-image>
<a-image id="slide1" class="slide1" src="#slide1" position="-2 2 0" rotation="0 90 0"></a-image>
<a-image id="slide1" class="slide1" src="#slide1" position="2 2 0" rotation="0 -90 0"></a-image>
<a-image id="slide2" class="slide2" src="#slide2" position="0 2 -2" rotation="0 0 0" ></a-image>
<a-image id="slide2" class="slide2" src="#slide2" position="1 2 2" rotation="0 180 0" ></a-image>
<a-image id="slide2" class="slide2" src="#slide2" position="-2 2 0" rotation="0 90 0"></a-image>
<a-image id="slide2" class="slide2" src="#slide2" position="2 2 0" rotation="0 -90 0" ></a-image>
<a-image id="slide3" class="slide3" src="#slide3" position="0 2 -2" rotation="0 0 0" visible="false"></a-image>
<a-image id="slide3" class="slide3" src="#slide3"position="1 2 2" rotation="0 180 0" visible="false"></a-image>
<a-image id="slide3" class="slide3" src="#slide3" position="-2 2 0" rotation="0 90 0" visible="false"></a-image>
<a-image id="slide3" class="slide3" src="#slide3"position="2 2 0" rotation="0 -90 0" visible="false"></a-image>
<a-image id="slide4" class="slide4" src="#slide4" position="0 2 -2" rotation="0 0 0" visible="false"></a-image>
<a-image id="slide4" class="slide4" src="#slide4" position="1 2 2" rotation="0 180 0" visible="false"></a-image>
<a-image id="slide4" class="slide4" src="#slide4" position="-2 2 0" rotation="0 90 0" visible="false"></a-image>
<a-image id="slide4" class="slide4" src="#slide4" position="2 2 0" rotation="0 -90 0" visible="false"></a-image>
<a-image id="slide5" class="slide5" src="#slide5" position="0 2 -2" rotation="0 0 0" visible="false"></a-image>
<a-image id="slide5" class="slide5" src="#slide5" position="1 2 2" rotation="0 180 0" visible="false"></a-image>
<a-image id="slide5" class="slide5" src="#slide5" position="-2 2 0" rotation="0 90 0" visible="false"></a-image>
<a-image id="slide5" class="slide5" src="#slide5" position="2 2 0" rotation="0 -90 0" visible="false"></a-image>
</a-scene>
</body>
<script src="app.js"></script>
</html>
The quick answer is don't use github pages for video hosting.
The longer answer is, when I check https://ybinstock.github.io/GreatEscape360/video2.mp4 it returns only 133 bytes which is obviously not correct. It is odd since the file's page in the github GUI does allow you to download the entire file: https://github.com/ybinstock/GreatEscape360/blob/master/video2.mp4
So we can see the file is successfully placed in your repo but github pages won't serve it. The only solution I can suggest is another third-party file host.