If you need to make profesional videos when you go live in Youtube, Facebook, etc here I present you a great product that can do all that.
You can use your camcorder, video switcher to change between different cameras. This will help you to use multiple internet upload streams for redundancy and high quality in the transmission so you can use 720p or 1080p even if with one of your internet connections is not fast enough. You can add them all at the same time.

You can own it here