I believe youtube is the favourite public video streaming service, but other good services include Netflix, Hulu, Amazon video, Playstation Vue. Mobile live viewing is very much an area that is being developed. The mobile phone offers the ordinary individual the potential for viewing events with public appeal.
There are already many live streaming systems used in companies for their own purposes, such as dissemination of information or education. As a form of entertainment, such as you-tube provides, legitimately or illicitly (e.g. the watching of video accidents and traumatic events) a constant supply of millions of videos is needed. As for mobile viewing, however, depends upon the processing capacity of mobile phones and the security of airwaves.