IMDB, YouTube, and BBC News are all top-cited sites (per older data from here). Feeding the following sample URLs from those sites generates citations with missing works/publications/website title data:
http://www.imdb.com/title/tt0100403/?ref_=nv_sr_3
https://www.youtube.com/watch?v=CGcWTIWYDMQ&feature=youtube_gdata_player
http://www.bbc.com/news/uk-england-tyne-31552307
e.g., that BBC link generates:
{{Cite web|title = 'Five-legged sheep' Quinto gives birth to twins in Morpeth|url = http://www.bbc.com/news/uk-england-tyne-31552307}}
should probably have a publisher=BBC field. (BBC may be different from the others, in that it should probably go to cite news with BBC as newspaper rather than publisher, and in fact this is what happens for at least some news.bbc.co.uk URLs.)