so, i've realised that the [/youtube] uploading system (the "youtube" symbol next to the "link" button, has the ability to remove the audio mute found on most PV videos
take a look at this: http://www.youtube.com/watch?v=JvCuoPaQADg&feature=youtu.be
you can see how it has the audio muted...
but once i upload using the [youtube] function
note: both these videos have not been uploaded. My attempts to do so has failed in a half-screen frowny-face
you can see that the audio is not muted
Here's another example, you can see that the audio is muted on the Youtube page also.
(if you do not believe that this is the same video, right click the video and select "watch on Youtube")
once i uploaded a video (like the one shown above), on the official uploading system, the result was no video and no audio.
if it was intended, could any team member suggest the choice of a "[youtube] upload" when uploading videos. That would make completing whole PV lists much quicker