1. Guidelines for Presenting Archived Video on the Web: An Overview AECT Annual Convention Dallas, TX October 12, 2006 David Klein K. “Fritz” Thompson

2. Overview  Introduction  Technology of web-based video  Video players  Analysis  Future

3. About Us  Law, Health Policy & Disability Center  http://disability.law.uiowa.edu  Standup training  Accessible video of talking heads  Almost 100 hours online video  75 hours of online audio

4. About Us  Players  QuickTime  Windows Media Player  Flash  Closed captioned  Supporting documents  Transcripts  Handouts  PowerPoints  Accessible for people with disabilities

5. Archived Video  Any stored video, available on demand via the Web

6. Clients vs. Servers Server Clients

7. Clients vs. Servers  Server  Stores HTML, video, caption text, other files  Files stored on different servers  Client  Displays HTML in browser  Launches players  Assembles/packages the pieces  Video  Caption  Video Player  HTML

8. Client View Browser Window Embedded Player Video Captions Supporting Information

9. Embedded Captioned Video HTML File ServerClient Video File Caption File Combining File

10. External Video User clicks link Standalone Player Client standalone player is launched

11. Web-based Video Delivery  Streaming  Download  Progressive download

12. Streaming  Continuous, active client-server connection  Benefits  Live broadcasts  Low client hard drive space usage  Protection of intellectual property (IP)  Disadvantages  High bandwidth  Network expertise  Troubleshooting  May require client network setup (firewalls)

13. Download  Movie downloaded to client drive & THEN played  Benefits  Minimizes bandwidth  Multiple views from same download  Distribute to others  Disadvantages  Must use standalone player  Usability  Requires hard drive space  Disconnected from supporting information (copyright)  Distribute to others

14. Progressive Download  Play video WHILE downloading  Benefits  Maximizes experience – bandwidth vs. wait time  Can be saved and redistributed  Range of IP protection control  Easiest for users  Disadvantages  Uses hard drive space (but temporarily)  Starts and stops  Once downloaded, can be disconnected from supporting information

15. Compression  See differences in compression codecs and settings Click.

16. Decision Matrices  Learning Context Analysis (Source)  Learning Context Analysis (Learner)  Learner Analysis

17. Learning Context (Source)  Production Quality – outlined techniques that improve quality for web-based video  Emphasize audio (usually) Audio without video is radio Video without audio is junk  Product Quality – range of quality that would be likely in these environments

18. Learning Context (End Product)  Streamed video  Biggest difference – knowledge and experience needed for production  Cost a factor  Progressive Download  Not much difference

19. Learner Analysis  Cost  Cognitive load: actions required by learner  E.g., download and install plugin  Consistency and usability of menus  Marketing by player manufacturers  Flexibility and scripting support  OS and browser support

20. Future  iPods and personal media players  Inexpensive hosting  YouTube  Google  Yahoo!  Podcasting (vodcasting?)  Video on demand (commercial)  HD

21. Contact  Law, Health Policy & Disability Center  http://disability.law.uiowa.edu/ http://disability.law.uiowa.edu/  This presentation  http://disability.law.uiowa.edu/lhpdc/publications/kleinpubs.html http://disability.law.uiowa.edu/lhpdc/publications/kleinpubs.html  LHPDC Bulletin Board  http://disability2.law.uiowa.edu/bbs http://disability2.law.uiowa.edu/bbs David Klein 280-1 Boyd Law Bldg. College of Law University of Iowa Iowa City, IA 52242 319-335-6748 david-klein@uiowa.edu K. “Fritz” Thompson 280-1 Boyd Law Bldg. College of Law University of Iowa Iowa City, IA 52242 319-335-6748 kenneth-d-thompson@uiowa.edu