I have blocked www.youtube.com - so it is unavailable on a PC or laptop - however my kids can still access - on their moible devices - endless videos of idiots playing computer games and shouting about them in high pitched annoying voices.
Hi jimster, unless the kids are connecting to your talktalk wifi they'll be able to access the site on their mobile i.e. via 3g/4g or another wifi connection not protected by HomeSafe.
Please log in to My Account if you need to view or pay your bill, manage boosts and track your usage. From My Account you can also check your connection and test your line for any issues in the Service Centre.