An excellent idea! Placer County Master Gardeners/Composters are IN. We just approved a video camera in our new budget, have our Demonstration Garden up and running, and this just ties it all together beautifully.

You need to dress that up. Here is one I put up last week as a example for a 20 minute training video I made: http://www.youtube.com/user/CamarilloGardens?feature=mhee  
 
The videos you put up can be selected from other people's content as well as your own...  
 
Until you reach a threshold, there is a 10 minute limit to the uploaded videos. After you reach a certain number of videos and views, you get bumped up to 15 minutes, then a half hour.  
 
Focus your efforts on one problem - one solution - one <10 minute video.  
 
As far as video cameras are concerned, a Flip HD or Kodak Zi-8 are under $150 and produce great HD 720P video. The Kodak offers a mic-jack to take external audio inputs as well...

I stand corrected. The current time limit has been increased for new channels to 15 minutes.  
 
I did some more checking and looked at what point my channels have had the 15 minute limit lifted.  
 
What I found suggests that the number of friends and subscribers plays a major role. A secondary factor is number of videos on the channel. One thing to note here is that the videos you favorite from other channels also seem count towards your content.  
 
You are welcome to use this one of Jose DeSoto, Director of the Hansen Agricultural Center, speaking on the Asian Citrus Psyllid : http://www.youtube.com/user/CamarilloGardens?feature=mhee#p/a/u/1/Ne8SSKShiDE  
 
That video - in its various incarnations - is approaching (or may have already passed) 2,000 views. Not bad for talk in front of 8 people.  
 
It is definitely in your best interest to consolidate all your videos, friends and subscribers in one channel. It is very important to tell your readers to subscribe to your channel and to add you as a friend.  
 
Major changes occurred two weeks ago. When Bing and Yahoo announced inclusion of 'social signals' (specifically 'likes', 'recommends', 'shares', adding as a 'friend' or subscribing, tweets and other un-specified sources) into page ranking, Google countered within 36 hours. They announced they, too, were using social signals to boost page rankings.  
 
This social sharing applies to each individual video as well as the overall channel. Optimize each videos with pertinent description, title and keywords, localize the video with Google maps, and make liberal use of tags. These things all make your videos show up in the searches.  
 
Start the description of each video with the full URL to the county web site responsible for the video followed by a couple of spaces and the description.  
 
The URL is always visible if it is on the first line. The URL must have the http:// part for it to be clickable. This creates a solid backlink to the county web site. This means both additional direct traffic and greater visibility in searches.  
 
Get your YouTube viewers to click the 'like' and 'favorite' buttons, and 'share' your videos.

Here's another way to produce videos from power point slideshows, still photos and video clips. Microsoft Producer (http://blogs.office.com/b/microsoft-powerpoint/archive/2008/06/06/the-return-of-producer-for-powerpoint.aspx) is a free utility that allows you to capture your power points, add narration and sound tracks, and it sfree. Check it out, it could get you going without invest in gear

This is good chanel, i was see the last update video, good job :D