The trailer is an 8 minute video… a bit long.
You probably know Hair Faire is an event to benefit Wigs for Kids. You can visit in-world here (SLURL). The fair ends July 26th.
As usual the regions are full to capacity, about 40 people. Peak use in SL is about 2 to 3 PM PT. The minimum use time is about 2 to 3 AM PT.