Sourcing the equipment
Many congregations will already have suitable equipment that is currently being used to project images onto a screen in church during a service. A computer/internet connection could then be linked to the camera and used to record/transmit the service. However, if the technology is being acquired for the first time it is important that it is fit for purpose.
The General Trustees can provide independent advice on AV installations (including equipment for live streaming) if you provide them with details of what you are trying to achieve. Visiting congregations that are already live streaming can assist greatly in determining what exactly you want to do and how you might do it.
Also, bear in mind the importance of obtaining several price quotations, if possible, in order to fulfil your duties as charity trustees (see the Law Department's guidance notes on charity trusteeship and anti-bribery, available in the Law Circulars section of the website).