These are some library related videos you can use in your library orientation:

Bleeding Libraries (YouTube)
http://teachertube.com/viewVideo.php?video_id=183895&title=Bleeding_Libraries&ref=Sraslim

LAUSD "Ask Me!": http://teachertube.com/viewVideo.php?video_id=169181&title=Ask_Me___LAUSD_Teacher_Librarians&ref=Sraslim

FJUHSD Cybersafety Project Video: http://teachertube.com/viewVideo.php?video_id=163376&title=FJUHSD_Cybersafety_Activities&ref=Sraslim

Haunted Love
In this video a patron breaks all the rules and the librarians trap him in the closed reserve stacks as punishments (Upper grades only, it's a bit sexy).

The Dewey Decimal Rap
A hokey rap video with a very catchy tune that overviews all the categories in the Dewey Decimal System.

Librarians do Ga Ga
Students and faculty from the University of Washington's Information School get their groove on to the tune of Lady Ga Ga's Poker Face. Encourages use of the Big6, the library catalog and databases.

SuperLibrarian: http://www.youtube.com/watch?v=Bu-TijjVs_g

Librarian Lays Down the Law: From "Party Girl" movie: http://www.youtube.com/watch?v=gzbDdgWiaS0 (but she does say "damn")

Introducing the Book: http://www.youtube.com/watch?v=xFAWR6hzZek

Gotta Keep Reading Ocoee Middle School:
http://www.youtube.com/watch?v=x6D9jiEYxzs&feature=related

Ocoee Middle School News Story
A news story showing the filming of the Ocoee Middle School students music video using the tune from "I Gotta Feeling" by Black Eyed Peas to promote reading.

Notes:
These videos are on YouTube, which is blocked at most sites, so you can download them using Zamzar
I usually download in MP4 format which can be played using Windows Media Player.

Jackie Siminitus Blog: Library Advocate Lots of library related videos are posted on this blog.