Changed check_url to check_plain in _video_get_fileurl

in order to make mms:// or rstp:// links usable.

Fixed some grammar errors on video_upload
Thanks Darryl (http://drupal.org/user/64435) for pointing this out.

Fixed an error on video_multidownload which generated a function
undefined error.

Moved some video_multidownload specific ssettings from video.module
to video_multidownload

Added global $user to video_access.
Thanks kungfoo (http://drupal.org/user/65090) for pointing this out.