Add video tutorial

Author: sobakintech

docs/beginners_guide/index.md

@@ -7,6 +7,9 @@ pagination_prev: null
 # Beginner's Guide
 This guide will teach you the basic stuff about Manifestor.cc and SteamTools ([What's SteamTools?](faq#whats-steamtools))
 
+Watch our [video tutorial](https://www.youtube.com/watch?v=VXKIB877-g8) to get started:
+<iframe width="560" height="315" src="https://www.youtube-nocookie.com/embed/VXKIB877-g8?si=o-hbo3JbGG8Nw_WU" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
+
 ```mdx-code-block
 import DocCardList from '@theme/DocCardList';