Lost connection to Samsung Smart TV

UPDATE!
OK. I’ve managed to get video playback working again on the Samsung TV.
I downloaded an app for my iPhone called ‘Twonky Beam’. I assume it’s also available for Android.
It takes about 15-20 seconds or so to find the drive on the network, but all photos and videos can be played directly via the app to the TV.
I have played a couple of music videos and they work fine.
One of the problems I had previously was movie playback dropping the connection about 30 minutes in. Having watched the beginning of the same movie twice already, I will need to get in the right frame of mind before I test this again!
Let me know if you have any luck with this.