I give up on Video

My daughter in Seattle and myself in Houston were using 4.7 with audio and
video. Now all of a sudden we cannot get 4.7 or even 5.0 to work with
video. UPNP is installed on both machines and both have run the Audio
tuning wizard. I am using cable, but the funny thing is that my brother who
has the same cable company as me can see and hear my daughter just fine.
Downloaded Logitech messenger service which works with 5.0 and it will not
work.. Any possibility that an update is causing this problem..