This video will show you how to put Samsung Galaxy S5 into Download Mode.
Recently I purchased this Samsung Galaxy S5 and I wanted to try and get some more videos up of what you can do with it Rom wise. So the download mode is important as you will need to know how to get the phone into download mode to be able to flash the rom/ firmware. So keep an eye out for more videos to come.
Its a great phone currently I am still using a work supplied iPhone 4S but shortly I think I will switch over to this one and start using it full time.