Ok, here’s a quick tutorial on how to properly embed YouTube videos since I have been seeing a lot of incorrectly done ones lately
1.) find your vid on youtube
2.)copy the url at the top of the screen
3.) paste here, it should look like this.
https://www.youtube.com/watch?v=lXFSvPhw71g
4.) finally remove the https:// from the url and the video will show up, like this
www.youtube.com/watch?v=lXFSvPhw71g
Good luck ;D