_VALID_URL = r'''^(?:https?://)?
(?:(?:(?:www\.)?soundcloud\.com/
- (?P<uploader>[\w\d-]+)/(?P<title>[\w\d-]+)/?
+ (?P<uploader>[\w\d-]+)/
+ (?!sets/)(?P<title>[\w\d-]+)/?
(?P<token>[^?]+?)?(?:[?].*)?$)
|(?:api\.soundcloud\.com/tracks/(?P<track_id>\d+))
|(?P<widget>w\.soundcloud\.com/player/?.*?url=.*)