Version:1.0.0.r5
Supported series: AS70, AS50, AS51, AS61, AS62, AS31, AS32
Find the app and install from App Central Once installed, open YouTube App on your mobile, the following screenshot shows feature is enable (left) and connected (right).
You can choose one NAS from the list to cast video, if there are more than 1 NAS detected in the network.

Note:
1. The NAS is connected with TV via HDMI
2. ASUSTOR Portal must be installed on the NAS already
3. Please install Media cast app from App Central.
4. Media cast icon is not shown on ADM desktop after installed. Please directly open YouTube app on your mobile devices once installed Media cast.
5. In order to watch YouTube in full screen, please set overscan to 0% on ASUSTOR Portal's setting page.