Changes to DownloadUrlResolver

[anilgit90]

1. Changed signature resolving.
2. Changed player regex url resolver.

[ac-lap]

Nice job dude! Will try and code-review/test your changes sometime next week or post Christmas.
Given the main repo is not being actively maintained, let's see if we can maintain your forked repo.

[HelgeStiemerling]

Hello,

self problem with: https://www.youtube.com/watch?v=G4mlA65wsbE

public static string DecipherWithVersion(string cipher, string cipherVersion)
{
string jsUrl = string.Format("http://s.ytimg.com/yts/jsbin/player-{0}.js", cipherVersion);

        string js = HttpHelper.DownloadString(jsUrl);

404 file not found jsUrl

[rcabreu]

This did not download https://www.youtube.com/watch?v=7rwW1ErcVu8