Here are a few NHibernate videos I've come across in my online wanderings.  Of course, I still believe the best video tutorial can be found at Summer of NHibernate, but here are a few others you may find useful.

• dnrTV Show #51: Oren Eini on NHibernate - http://www.bestechvideos.com/2008/07/04/dnrtv-show-51-oren-eini-on-nhibernate
• Rebel Heart - NHibernate Video Tutorial - http://rebelheart.squarespace.com/blog/2008/2/25/nhibernate-video-tutorial.html (Very poor quality)
• Mohammad Azam: Introduction to NHibernate - http://aspalliance.com/1413_Video_Introduction_to_NHibernate
• Mohammad Azam: Creating One-to-Many Relationships Using NHibernate - http://aspalliance.com/1424_Video_Creating_OnetoMany_Relationships_Using_NHibernate
• Mohammad Azam: Derived Properties Using NHibernate - http://aspalliance.com/1448
• Mohammad Azam: Creating Many-to-Many Relationships Using NHibernate - http://aspalliance.com/1462
• Mohammad Azam: Using the HQL (Hibernate Query Language) to Execute Queries - http://aspalliance.com/1438

If you find any that aren't listed here, please drop a link in the comments