Just ordered one MrS, hopefully it does the job!
What YouView service are you trying to extend? If say BT TV, this uses multicast which only works over ethernet, hence a wifi extender like this would only work for things such as Netflix, 4OD, ITV player etc, but it would not provide you any of the BT TV channels over multicast such as BT Sport (all channels), TLC, MTV etc.
Generally speaking providers only offer Ethernet solutions for this reason (e.g powerline or a long ethernet cable).
EDIT: Seen TalkTalk signature, apparently boost channels etc work fine on TalkTalk Youview over WiFi adaptors provided they support IGMP.
Edited by ukhardy07 (Fri 08-Sep-17 00:18:43)