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RE: Keyboard & Youtube and Pause Stop Hide

From: Roger Hudson <rhudson@usability.com.au>
Date: Thu, 29 Mar 2012 08:02:49 +1100
To: "'Pierre Frederiksen'" <Pierre.Frederiksen@visionaustralia.org>, <w3c-wai-ig@w3.org>
Message-ID: <001f01cd0d26$23b20500$6b160f00$@com.au>
Many thanks Pierre for your timely questions for this issue has often bugged


Increasingly video material from youTube is being embedded  into pages and
although it is generally fine with IE, there are problems with other
browsers. From an accessibility perspective this requires balancing the need
to make things accessible against the danger of placing the bar so high that
fewer people will bother trying, a dilemma I suspect we will be increasingly


YouTube has made the process of providing captions (in English at least) so
much easier that I don't think  web developers and site owners can really
consider this to be a problem any longer. However, the lack of keyboard
access to the Flash controls with some browsers (and the tendency to trap
the keyboard) will be a problem for some keyboard users.


Also thanks Pierre for your accessible youtube controls


I noticed Ohio State University also has done some work on accessible
controls http://wac.osu.edu/examples/youtube-player-controls/ 


Do either of these overcome the problems you raise?




From: Pierre Frederiksen [mailto:Pierre.Frederiksen@visionaustralia.org] 
Sent: Wednesday, 28 March 2012 4:10 PM
To: w3c-wai-ig@w3.org
Subject: Keyboard & Youtube and Pause Stop Hide




I would be great to hear your opinion on these two (finer?) points regarding
WCAG 2.0 conformance:


2.1.1 Keyboard

Currently the standard Flash YouTube player is not keyboard accessible in
Firefox, Chrome and Safari. Only Internet Explorer provides keyboard access
to the content.

Does this mean that the standard YouTube player fails this Success Criteria
or is this a question of browser capability and not the responsibility of
content creators?

The Flash technique for providing keyboard access 
only works for Firefox


2.2.2 Pause, Stop, Hide

Consider a slide show that automatically changes the slide and does so
continually until the user intervenes. The slideshow contains buttons that
can be used to change to each of the slides (e.g. buttons 1,2,3,4,5)

Should an explicit pause button (either with the word Pause or with the
pause symbol) be provided, or is it sufficient if the slideshow stops the
automatic movement as soon as one of the slide selector buttons has been


The WCAG "Understanding" document states:


"For a mechanism to be considered "a mechanism for the user to pause," it
must provide the user with a means to pause that does not tie up the user or
the focus so that the page cannot be used. The word "pause" here is meant in
the sense of a "pause button" although other mechanisms than a button can be
used. Having an animation stop only so long as a user has focus on it (where
it restarts as soon as the user moves the focus away) would not be
considered a "mechanism for the user to pause" because it makes the page
unusable in the process and would not meet this SC."


.       It states that 'other mechanisms" than a button can be used.

.       The reason that the focus solution is rejected is not that is
doesn't have an explicit pause button, but that is unusable (because if you
focus on other content the slideshow starts again).

So you would think that if the slideshow stops once one of the slide
selector buttons has been pressed it is OK?


Thanks heaps







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Received on Wednesday, 28 March 2012 21:04:26 UTC

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