There's been a lot of new apps appearing on the Virgin Media TiVo platform recently. Most of these have been promotional apps for mobile phones and certain TV channels/content (sorry, no Lovefilm or Netflix yet). But one of the new apps (or rather, an update of an existing one) has been for YouTube.
The new app is much improved over the old versions and finally allows you to login to your YouTube account (which is far easier than you'll expect) and view your subscriptions and playlists, subject of course, to content restrictions.
There's room for improvement here. For instance, you can't watch content which you'll flagged as 'watch later', and the subscriptions content is all in one list, and isn't divided into a folder per channel. Still, this is a massive improvement on previous versions of the app, and from my (very limited) testing, the video quality is at least on a par with the Xbox 360 version of the app.
V6 update being rolled out - There's a new update being rolled out to V6 boxes to address some of the bugs. If you have the update your firmware level will be 220.127.116.11.RC6-VMB-11-C68 ...