you may configure access control on the router to block the target which is YouTube.

:confused:how do you find is reverts to factory default settings? how about reset the router by clicking restore to factory defaults and reconfigure the router entirely? Moreover, maybe you can try...

Maybe you can change the wireless channel on the router or upgrade the firmware of this unit:)

If the CD does not work, how about configuring it by using the web console 192.168.1.1?

It's a pity to hear that. However, as far as I am concerned, TD-W8960N should be able to be connected with TL-WR2543N with WDS. when you set them up, maybe you can check the settings: has Bridge...

I do not know why, that seems to be quite professional... But I have heard that disable WMM may solve the wireless connection issue between the router and Apple device as well as some smart phone.