I like the video "N2510 Network Evaluation and O&M" which is about 7 minutes long. I like the video because the content is pretty easy to understand and a non-technical person will also understand the content easily. However, that is also an issue/problem. The content depth is too shallow. Another thing is that the background music gets boring after sometime and I start to loose concentration. I guess you need to use vary the tone more often so that people dont fall asleep!

My most favorite is "A Trip to 9800 with Bobby" which is about 4 minutes long. However, the video takes you to through differents links for a wide varity of contents. Hence, the actual time will solely depend on individual. I myself browsed through a few links and that took me about 20 minutes and I still have a good few contents left. I like this video because its content is very rich. The only problem I found is that the navigation is a bit tough and since there are a lot of links I lost my way after sometime! Still the video is totally worth the trouble.

I also liked the video "MA5600T Upgrade Guide 02 (U2000, Multimedia)" because it is very easy to follow. The length is about 8:39 minutes. The only issue is that sometime the instruction was going too fast and the font was a bit blurred so I couldnt read them easily. Otherwise the content is good enough.

fine ..