616657 - Youtube WebM video will not start. JS error appear in error console.

Status: VERIFIED DUPLICATE of bug 616252

(Core :: JavaScript Engine, defect)

Description

[Alice0775 White]

Build Identifier: 
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0b8pre) Gecko/20101203 Firefox/4.0b8pre ID:20101203030309

Youtube WebM video will not start.
This happens on Linux build too.

On the other hand, http://lachy.id.au/log/2010/05/webm works well.

Reproducible: Always

Steps to Reproduce:
1. Start Minefield with new profile
2. Open URL ( http://www.youtube.com/watch?v=X3F3KmZDtyg&webm=1&html5=1 )
3.

Actual Results:
 *Youtube WebM video will not start.
 *An Error appears in error console while page is loading:
  Error: uncaught exception: [Exception... "Not enough arguments"  nsresult:
  "0x80570001 (NS_ERROR_XPC_NOT_ENOUGH_ARGS)"  location: "JS frame ::
  http://s.ytimg.com/yt/jsbin/www-player-vflvB8nZa.js :: <TOP_LEVEL> ::
  line 94"    data: no]

 *Error appear in error console when I click video container:
  Error: a.a is null
  Source File: http://s.ytimg.com/yt/jsbin/www-player-vflvB8nZa.js
  Line: 107

  Error: c is null
  Source File: http://s.ytimg.com/yt/jsbin/www-player-vflvB8nZa.js
  Line: 106

Expected Results:
 *Youtube WebM video will start.

Comment 1

[Boris Zbarsky [:bzbarsky]]

Someone on the youtube team wrote nonstandard code and didn't test...