hmmm....
I have found some of the best video tutorials on the web at Kelbytv.com.
One of my favorites is PhotoshopUsers TV. It's free to watch, and free to download. Average show lengths are about 20-30min., with tips for everything including Lightroom. Usually there's a new show weekly, but just like most tv "seasons" they do take time off for a month or so, before airing new episodes. Sometimes they toss in a "special" or two around holidays.
At Kelbytv.com there are other video tutorials as well, such as LayersTV, and also some specifically geared towards digital photography. Best part is, it's all FREE.
These shows are well produced as well....although sometimes the audio levels could be a bit louder....whoever does the audio work needs some lessons, lol!
Anyhow, give them a watch. The guys on PhotoshopUsersTV make the show interesting, and inject a bit of humor. IMO, it's one of the best produced shows out there.....kindof wish it was in syndication, lol! Of course, I download episodes, stitch a few together, and make my own hour or so long "shows" of the ones that have stuff I am interested in or will use, so I have a reference, and something to watch when I am bored.