Sky Vega A900S,L,K 4K Video Recording Information

Note
             Vega A900 4K Video Recording Supported But Not Supported On 4.4 Kit-Kat Version
So When Lollipop Update Available For This Model Then 4K Video Recording Working..
Now Many Lollipop Custom Rom's Available For This Model. But Not Stable So Wait For Final Version Of CM 12.1. When Stable And Final Version Available For This Model Then I will Upload On This Blog. So Keep Visiting. 
Thanks For Reading Above Information is 100% Correct