If you are a UK resident, you require a TV license in order to watch Revelation TV. This is true regardless of how you watch the channel.
If you watch online, on a set-top-box, Roku box, Smart Phone, Ipad or other tablets, Amazon Kindle Fire, etc, you must have a TV license. However, if you only watch video-on-demand/catch-up TV services and do not watch the live stream (which is what is currently being broadcast to conventional TVs) you may not need a license. In this case, we would suggest that you check with the TV licensing authority. You can find out more at http://www.tvlicensing.co.uk