Can I use the Chromecast to access my WD Tv Live ? If it does it would be a cheap way to stream to the patio TV ( instead of buying another wdtv)
Check if your WDTV Live has a built in DLNA server, if it doesn't, and if your content on a USB drive that's connected to WDTV Live, then likely it's a no. (I only have the old one not the new one so unsure of any additional features).
But if you're playing media from a server (over network), then you can use some of the chromecast supported apps and re-direct the content to the dongle.. e.g. I'm using Plex as my media server and I can play that on my old WD TV Live or on the Chromecast.