Help with a Wireless Video Sender and receiver

I am looking to get a wireless video sender and receiver to send the sky signal to my TV which is located up stairs. 

Firstly, is this possible and what are the best products in the market at the moment. 

I do not mind spending a bit of cash but have seen so many I do not know what is good and bad.  

I need something that does not get disrupted by Wifi and where I can use my sky remote without having to run downstairs to change the channel! 

Any help would be much appreciated. 

Thanks, Rach