My youtube wordpress plugin works via
[!youtube]L1BDM1oBRJ8[/youtube!]
I also wanted to be able to do it via
https://youtube.com/watch?v=L1BDM1oBRJ8
https://youtube.com/watch?v=L1BDM1oBRJ8
www.youtube.com/watch?v=L1BDM1oBRJ8
youtube.com/watch?v=L1BDM1oBRJ8
watch?v=L1BDM1oBRJ8
v=L1BDM1oBRJ8
L1BDM1oBRJ8
https://youtube.com/v/L1BDM1oBRJ8
Code:
$regex = "/\[(?:(?:http:\/\/)?(?:www\.)?youtube\.com\/)?(?:(?:watch\?)?v=|v\/)?([a-zA-Z0-9\-\_]{11})(?:&[a-zA-Z0-9\-\_]+=[a-zA-Z0-9\-\_]+)*\]/";