Workaround for #4583 (JAWS+IE doesn't announce BPB or play button)

[OwenEdwards]

Description

Workaround for #4583 (JAWS+IE doesn't announce BPB or play button)

Specific Changes proposed

Add ARIA role="application" to the <video> element if the browser is IE, as recommended by @stevefaulkner in FreedomScientific/standards-support#78 (comment).

Requirements Checklist

• Feature implemented / Bug fixed
• Change has been verified in an actual browser (IE11 & JAWS 2018)
• Reviewed by Two Core Contributors

[gkatsev]

Sounds reasonable.

Another workaround, which is probably not as good, is to add a dummy button element immediately after the video element for JAWS to swallow up.

[OwenEdwards]

@gkatsev the problem with that is that focus will still move to that dummy button (if not, it doesn't fix the problem), and that dummy button will be unlabeled, which isn't good.

Hopefully Freedom Scientific/JAWS will fix this issue soon, but even then it will still work with this workaround since it's a workaround that they proposed themselves, so they'd be really shooting themselves in the foot if they fixed the problem in JAWS and afterward it didn't work with their own workaround!

[gkatsev]

yeah makes sense. This is definitely the better workaround.

[stevefaulkner]

@OwenEdwards

but even then it will still work with this workaround since it's a workaround that they proposed themselves, so they'd be really shooting themselves in the foot if they fixed the problem in JAWS and afterward it didn't work with their own workaround!

There is no reason why the 'workaround' will have any negative effects if/when the JAWS+IE issues is resolved. Use of role=application is conforming for the video element in HTML.
Also note I am not a freedom scientific employee, so its not a workaround that freedom proposed.