I fitted my own aerial in the loft, did try it outside but as its friggin massive it looked ridiculous so put it in the loft instead.
Mine connects to a splitter up there and feeds the main TV and daughters TV.
Signal wise I’m getting the same signal strength on my You View box as my dad does on his with a Chimney mounted aerial both receives signals from the same transmitter(Holme Moss)
Regards the You view , I get the occasional freeze so have to unplug the box for a mo to let it reset, but had similar escapades with Sky, its not quite as user friendly as the Sky boxes but there again there are some things it could do that the Sky boxes cannot.