If your ChromeCast can't connect to your Mac then you will be unable to stream videos form it. You can also enable this through System Preferences > Security & Privacy > Firewall. VideoCast must be allowed to receive network connections - If you have enable the Mac Firewall please allow VideoCast to receive connections when prompted. To control playback from your phone please ensure your Mac, phone and ChromeCast are all on the same Wifi network to allow them to communicate. This app cannot stream videos from your phone. You can play videos from your Mac on your ChromeCast using VideoCast and can control playback using your phone web browser. * Play almost any video file on your ChromeCast TV! This app automatically converts the video whilst streaming to your TV, allowing almost any video to be streamed to your TV - Videos play instantly! Supports almost every format: MOV, MKV, MP4, FLV, X264
What does VideoCast for ChromeCast do? VideoCast for ChromeCast streams all your videos to your TV and control playback from your phone!