Firstly, I think the video posted very recently gives a dramatic example of how difficult any sort of search can be under these conditions. In my opinion, the useful search range from the bridge of that vessel is going to be a couple of hundred yards, MAXIMUM!
It's a fake video. Taken in Jan, 2013, most likely in the North Atlantic.
Always makes sense to confirm sources before commenting upon them.
https://www.youtube.com/watch?v=Aow2ErSP3dQ