If your having trouble viewing various 'How Music Works' vids, its probably because WMG / BMG cannot extract advertising revenue from your part of the world, either that or they feel you need protecting from 20 second clips of Elton John.
Whatever the reason, torrents of full HQ episodes are available to download all over the place, like here:
isohunt.com/torrent_details/119407729/how+music+wo…
Enjoy.
**A quick note about copyright claims**
I believe wholeheartedly in the rights of copyright holders to claim sections or all these videos as their content, and to advertise appropriately. However, disputed music content is used in part and under Educational fair use. The disabling of videos for the sake of a 20 second clip constitutes a bullying attitude by the copyright owners and i believe counter productive for them and to the detriment of their content. Sort it out WMG, please.