I have had my Galaxy S5 for a while now, but have not had the chance to post a video test. I ran down to Universal Studios Orlando where I was able to grab both a 4k video test and a 1080p front facing video test. I have posted each of these at the link below. If you are on the fence between the M8 and the Galaxy S5 check out these video tests. Optimus Prime is featured in the 4k video and Harry Potter World is featured in the front facing video.