Cannot play multi cast video in Tizen tv

I am new to Tizen tv web application development. Currently I can call my webapplication placed in server using .wgt file, but facing following issues -
(a) How to control screen resolution.
(b)How to trap remote keys like (0-9, red,green,blue and yellow button, Home , Menu and Return keys)
(c) How to play Multi cast videos in Tizen tv, previously in non-tizen tv’s we are using “clsid:SAMSUNG-INFOLINK-SEF” plugin, but this is not working in Tizen.

Any suggestion will be very helpful for me.
Thanks in advance.