In fact, now that I do use my chromecast as it should, using the Plex Web App instead of the chrome tab cast (as explained in https://support.plex.tv/hc/en-us/articles/201206866-Cast-from-Browser-or-Desktop)) , it allows me to see videos from my PC through my Wifi in a perfect way (no audio or video jitter) on my TV.
Unfortunately, I can’t say the same for my wdtv smp ;-( that regularly looses the network…
I still hope it will work some day as does the chromecast.
