Guidelines for Presenting Guidelines for Presenting Archived Video on the Archived Video on the

Web: An OverviewWeb: An Overview

AECT Annual ConventionAECT Annual Convention

Dallas, TXDallas, TXOctober 12, 2006October 12, 2006

David Klein David Klein K. “Fritz” ThompsonK. “Fritz” Thompson

OverviewOverview

IntroductionIntroduction

Technology of web-based videoTechnology of web-based video

Video playersVideo players

AnalysisAnalysis

FutureFuture

About UsAbout Us

Law, Health Policy & Disability Law, Health Policy & Disability CenterCenter http://disability.law.uiowa.eduhttp://disability.law.uiowa.edu

Standup trainingStandup training

Accessible video of talking headsAccessible video of talking heads

Almost 100 hours online videoAlmost 100 hours online video

75 hours of online audio 75 hours of online audio

About UsAbout Us

PlayersPlayers QuickTimeQuickTime Windows Media PlayerWindows Media Player FlashFlash

Closed captionedClosed captioned Supporting documents Supporting documents

TranscriptsTranscripts HandoutsHandouts PowerPointsPowerPoints

Accessible for people with disabilitiesAccessible for people with disabilities

Archived VideoArchived Video

Any stored video, available on Any stored video, available on demand via the Webdemand via the Web

Clients vs. ServersClients vs. Servers

Server

Clients Clients

Clients vs. ServersClients vs. Servers Server Server

Stores HTML, video, caption text, other filesStores HTML, video, caption text, other files Files stored on different serversFiles stored on different servers

ClientClient Displays HTML in browserDisplays HTML in browser Launches playersLaunches players Assembles/packages the pieces Assembles/packages the pieces

VideoVideo Caption Caption Video PlayerVideo Player HTMLHTML

Client ViewClient View

Browser Window

Embedded Player

Video

Captions

Supporting Information

Embedded Captioned Embedded Captioned VideoVideo

HTML File

Server Client

Video File

Caption File

Combining File

External VideoExternal Video

User clicks link

Standalone Player Client

standalone player is launched

Web-based Video Web-based Video DeliveryDelivery

StreamingStreaming

DownloadDownload

Progressive downloadProgressive download

StreamingStreaming

Continuous, active client-server connectionContinuous, active client-server connection

BenefitsBenefits Live broadcastsLive broadcasts Low client hard drive space usageLow client hard drive space usage Protection of intellectual property (IP)Protection of intellectual property (IP)

DisadvantagesDisadvantages High bandwidthHigh bandwidth Network expertiseNetwork expertise TroubleshootingTroubleshooting May require client network setup (firewalls)May require client network setup (firewalls)

DownloadDownload

Movie downloaded to client drive & THEN playedMovie downloaded to client drive & THEN played

BenefitsBenefits Minimizes bandwidthMinimizes bandwidth Multiple views from same downloadMultiple views from same download Distribute to othersDistribute to others

DisadvantagesDisadvantages Must use standalone playerMust use standalone player UsabilityUsability Requires hard drive spaceRequires hard drive space Disconnected from supporting information (copyright)Disconnected from supporting information (copyright) Distribute to othersDistribute to others

Progressive DownloadProgressive Download

Play video WHILE downloadingPlay video WHILE downloading BenefitsBenefits

Maximizes experience – bandwidth vs. wait Maximizes experience – bandwidth vs. wait timetime

Can be saved and redistributedCan be saved and redistributed Range of IP protection controlRange of IP protection control Easiest for usersEasiest for users

DisadvantagesDisadvantages Uses hard drive space (but temporarily)Uses hard drive space (but temporarily) Starts and stopsStarts and stops Once downloaded, can be disconnected from Once downloaded, can be disconnected from

supporting informationsupporting information

CompressionCompression

See differences in compression See differences in compression codecs and settingscodecs and settings

Click.

Decision MatricesDecision Matrices

Learning Context Analysis (Source)Learning Context Analysis (Source)

Learning Context Analysis (Learner)Learning Context Analysis (Learner)

Learner AnalysisLearner Analysis

Learning Context Learning Context (Source)(Source)

Production Quality – outlined Production Quality – outlined techniques that improve quality for techniques that improve quality for web-based videoweb-based video Emphasize audio (usually)Emphasize audio (usually)

Audio without video is radioAudio without video is radio

Video without audio is junkVideo without audio is junk

Product Quality – range of quality that Product Quality – range of quality that would be likely in these environmentswould be likely in these environments

Learning Context (End Learning Context (End Product)Product)

Streamed video Streamed video Biggest difference – knowledge and Biggest difference – knowledge and

experience needed for productionexperience needed for production Cost a factorCost a factor

Progressive DownloadProgressive Download Not much differenceNot much difference

Learner AnalysisLearner Analysis

CostCost

Cognitive load: actions required by Cognitive load: actions required by learner learner E.g., download and install pluginE.g., download and install plugin Consistency and usability of menusConsistency and usability of menus

Marketing by player manufacturersMarketing by player manufacturers

Flexibility and scripting supportFlexibility and scripting support

OS and browser supportOS and browser support

FutureFuture

iPods and personal media playersiPods and personal media players

Inexpensive hostingInexpensive hosting YouTubeYouTube GoogleGoogle Yahoo!Yahoo!

Podcasting (vodcasting?)Podcasting (vodcasting?)

Video on demand (commercial)Video on demand (commercial)

HDHD

ContactContact Law, Health Policy & Disability CenterLaw, Health Policy & Disability Center

http://disability.law.uiowa.edu/http://disability.law.uiowa.edu/

This presentationThis presentation http://disability.law.uiowa.edu/lhpdc/publications/http://disability.law.uiowa.edu/lhpdc/publications/

kleinpubs.htmlkleinpubs.html

LHPDC Bulletin BoardLHPDC Bulletin Board http://disability2.law.uiowa.edu/bbs http://disability2.law.uiowa.edu/bbs

David Klein280-1 Boyd Law Bldg.College of LawUniversity of IowaIowa City, IA 52242319-335-6748david-klein@uiowa.edu

K. “Fritz” Thompson280-1 Boyd Law Bldg.College of LawUniversity of IowaIowa City, IA 52242319-335-6748kenneth-d-thompson@uiowa.edu