Vimeo is video community platform. It offers you to submit your videos in HD and 4K formats. One of the most noticeable aspects of this platform is that videos can be enjoyed ad-free.
Their goal was to provide this ad-free platform as the competitor to YouTube. They also prise themselves as being the first video sharing site that supported HD videos.
Their service allows you to host videos on their service as well as to share it however also to stream to it.