Governor Palin issued this short statement to Politico, extracted from article:

With video, Palin goes pro – By: Andy Barr & Jonathan Martin

Palin… explained to POLITICO in a statement that “sending my own message, minus the media filter, is a  valuable way to remind voters that they have great choices in these  upcoming mid-term elections.”

“The tools I’ll use, like this energetic video that showcases  commonsense Constitutional conservative women, will highlight a  significant movement in our nation as we advance ever closer to what  will be historic 2010 elections,” Palin said.

In the article Politico also has the inside scoop on the video production:

Despite the video’s high production values, SarahPAC, her political action committee, did not hire a well-known GOP media firm to produce the video. In keeping with her political style, a videographer was hired to follow Palin around to several events where she was a featured speaker.

The videographer made a rough cut of the video and presented it to four or five members of the PAC who then weighed in with suggested edits. After a few rounds of back-and-forth with the videographer, the PAC’s staff presented the video to Palin, who asked for a few changes of her own before signing off on the video.