
Dump <video> element controller accessibility object tree at 'canplaythrough' event.

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State at 'canplaythrough' event:

    description: AXDescription:
    role: AXRole: AXWebArea


        description: AXDescription: Video Playback
        role: AXRole: tool bar


            description: AXDescription:
            role: AXRole: AXGroup


                description: AXDescription:
                role: AXRole: AXGroup


                description: AXDescription:
                role: AXRole: AXGroup


            description: AXDescription: Play
            role: AXRole: AXButton


            description: AXDescription: Rewind 30 Seconds
            role: AXRole: AXButton


            description: AXDescription:
            role: AXRole: AXGroup


            description: AXDescription:
            role: AXRole: AXGroup


            description: AXDescription: Volume
            role: AXRole: slider


                description: AXDescription:
                role: AXRole: AXWebArea


            description: AXDescription: Mute
            role: AXRole: AXCheckBox


            description: AXDescription: Captions
            role: AXRole: AXComboBox


PASS successfullyParsed is true

TEST COMPLETE