center all youtube videos

Handbook/src/getting-started/installation/README.md

@@ -16,8 +16,12 @@ We also have older videos demonstrating both installation methods on Microsoft W
 
 - [Plugin installation guide for Microsoft Windows](https://youtu.be/QqWeRHNceqY):
 
+<div style="margin: 0 auto; width: 560px;">
 <iframe width="560" height="315" src="https://www.youtube.com/embed/QqWeRHNceqY" frameborder="0" allowfullscreen></iframe>
+</div>
 
 - [Plugin and examples installation guide for GNU/Linux](https://youtu.be/1T7LAGp3e6I):
 
+<div style="margin: 0 auto; width: 560px;">
 <iframe width="560" height="315" src="https://www.youtube.com/embed/1T7LAGp3e6I" frameborder="0" allowfullscreen></iframe>
+</div>

Handbook/src/getting-started/plugin-verify-version-enable/README.md

@@ -24,4 +24,6 @@ Enabling the SenseGlove Unreal Engine Plugin is a very simple and straightforwar
 
 A [video demonstrating the same instructions in more detail](https://youtu.be/iF0JU2kpNhw) is also available on [the SenseGlove YouTube channel](https://www.youtube.com/@senseglove4021).
 
+<div style="margin: 0 auto; width: 560px;">
 <iframe width="560" height="315" src="https://www.youtube.com/embed/iF0JU2kpNhw" frameborder="0" allowfullscreen></iframe>
+</dive>