Blog site with videos that focus on the Mac, Microsoft, Linux, and other Web 2.0 issues.

makeuseof

Popular PC print magazine also has a video channel devoted to bringing you the latest trends in the computer industry.

PC World

1.  
2. Gadgets,
3. Optoma pico...
4. Solar power

Technology reviews and video blog with a feminine twist.

Techie Diva

MIT associated media site with news and information about emerging technologies.

Technology Review

Provides video and information of everything tech related to network and IT executives.

NetworkWorld.TV

CNET affiliated site with videos that cover the business and tech world.

Silicon

Kewego powered site with videos in categories like hardware, gaming, pc, and fun.

Tom's Hardware

1.  
2. Religulous
3. Universal laws'
4. Tractor

Outlet where people share their scientific knowledge, research, and other related theories.

SciVee

1.  
2. Biology
3. Discovery...
4. Science channel

CNET property with videos on technology news and IT analysis.

TechRepublic

Videoblog that covers the latest trends in technology and on the web.

CommandN

UK based site with videos centered around the tech world.

Vnunet

Do-it-yourself videos and podcasts centering around the world of technology

Make:Videos

Tech based review site for Italian speakers and web users

IT Web TV

Watch how-to videos for your PC and listen to live answers from the tech guy.

PCMech

Video reports in categories like earth & space, engineering, and the sciences.

Discovery & Breakthroughs of Science

1.  
2. Natural...
3. Astronomy
4. Nanotechnology