How do you guys cast?

I usually create YouTube playlists of all my FB programs and then play off the YouTube app on the Roku on Tv, but it takes a lot of time. I can easily cast from YouTube, but with the launch of the new FB Plus will I still be able to go to my day on the calendar, play from YouTube and cast, or is there another way? I have an android phone. I feel like an idiot asking, but I could use some specific info and steps. Thanks! I am excited to get in on the action tomorrow, but I am hoping it won't be a big deal to access vids to the tv.