Apologies, but unfortunately not! 

One of the best parts of Videostream is our performance optimizations that let nearly any video stream easily to your Chromecast. This transcoding capability is very performance intensive which means that at this point that for the foreseeable future we'll be leveraging the capabilities of PCs to allow for flawless streaming and won't bring that natively to mobile anytime soon.
There are certain apps that are on the Play store that let you stream directly from your phone and we'd encourage you to check those out if that's what you're looking for :)