Include dash in the YouTube regex

[benbro]

YouTube ID can have the following characters [a-zA-Z0-9_-]
\w is missing dash

[benbro]

In the following example match[3] will be "b" instead of "b-VAxGJdJeQ"

var url = 'https://www.youtube.com/watch?v=b-VAxGJdJeQ';    
url.match(/^(https?):\/\/(www\.)?youtube\.com\/watch.*v=(\w+)/) 

[jhchen]

Thanks!