• 140 Videos, Slides, Films

• 131 Physical sciences
• 36 Mechanics
• 19 Electricity
• 19 Electromagnetism
• 19 Magnetism
• 17 Thermodynamics
• 14 Sound
• 14 Sound-waves
• 14 Wave theory of light
• 14 Waves
• 10 Astronomy
• 8 Engineering
• 8 Power resources
• 8 Technology
• 7 Energy facilities
• 7 Transportation
• 6 Industries
• 6 Power supply
• 5 Mechanical engineering
• 4 Cosmology
• 4 Galaxies
• 4 Outer space
• 4 Quantum theory
• 4 Space

• 137 Films Media Group
• 18 Cerebellum Corporation (Firm)
• 17 A&E Networks (Firm)
• 17 Liacos Educational Media (Firm)
• 14 PBS (Firm)
• 10 TVF International (Firm)
• 9 Films for the Humanities & Sciences (Firm)
• 9 Makematic (Firm)
• 9 Video Education America (VEA) (Firm)
• 7 Inside Science (Firm)
• 6 Magic Lantern Media Inc (Firm)
• 6 Public Broadcasting Service (U.S.)
• 3 TED (Firm)
• 2 BBC (Firm)
• 2 CNN (Firm)
• 2 Cinetic Rights Management LLC. (Firm)
• 2 Filmhub (Firm)
• 2 National Geographic Digital Media (Firm)
• 2 Prime Entertainment Group (Firm)
• 1 A&E Television Networks, LLC
• 1 Discovery Education (Firm)
• 1 Economist Group Limited (Firm)
• 1 Granada Media (Firm)
• 1 Ideas Roadshow (Firm)

• 137 English
• 3 Unknown

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