[tiktok] Short URL support

[BMitrovic17]

This short URL is a redirection for exactly the same url for video in the test file tiktok.test.js#L42. Unfortunately it's not being parsed.

When using the app and sharing a link you end up with this type of the short link.

Can we please get support for it as well ? :)

http://vm.tiktok.com/ZSqYTVQx/