Cannot get playback from DVR onto wifi connected devices

I have an Xfinity DVR and home internet.  I have been able to use the web to stream the shows from my DVR onto a (Windows 10 running) PC, but now I am unable to get them to load, or to get anything to play on the xfinity stream page (https://www.xfinity.com/stream).  It just loads and loads until it finally says it is not available, or says it is available on demand, but then even that doesnt work.  Have done all the usual, restart and unplug router and wifi, restarted computers, made sure no VPN was active, but still no luck.  Someone have any ideas?