It supports encryption as standard, and it also has a ‘mesh network’ as standard which means that ZigBee devices can link together and improve the range (and reliability) of your overall ZigBee network. Zigbee: this is a low-power, low-bandwidth protocol which was designed for home automation and similar uses.It’s limited in terms of how much data can be transmitted, meaning that although video data can theoretically be streamed over Bluetooth, in reality this doesn’t work too well and so WiFi is often used for anything beyond music streaming. Bluetooth: this technology is more commonly used on portable devices such as mobile phones, headphones and laptops and it allows small amounts of data (up to and including music) to be transmitted from one Bluetooth device to another – hence it commonly being used for streaming music from a phone to headphones.

The nice thing about WiFi is that it’s wireless – you don’t have to run cables everywhere for your TV or Echo to connect to the internet.

Your internet router broadcasts a WiFi signal around your house, allowing a whole host of devices (from phones to TVs, and Kindles to Amazon Echos!) to connect to the internet via WiFi. Wait, love – really?! Well, it used to be quite temperamental although in recent years it’s got increasingly stable. WiFi: WiFi is the standard we all know and love.For more detailed explanations, check out the specific sections later on. But either way, I wanted to briefly run through them below. Most of us have heard of WiFi and Bluetooth, and you may also have seen ‘Zigbee’ mentioned if you’ve looked into Philips Hue or the Amazon Echo Plus. In your first scenario, you could also use a WiFi repeater (or mesh routers) to extend your main WiFi range, but I think it's not what you are looking for.My Philips Hue v2 Bridge ‘speaks’ Zigbee, not WiFi. That way any camera that has WiFi and local streaming capability (most have it, even if lots of no-brand camera don't advertise it as much as their cloud streaming)

Otherwise, you could still install a WiFi router without internet access near the camera.

I don't know where you are from, so I'll just provide an example from Amazon US: That camera can be viewed in live using the camera's WiFi network. It's intended to be used in the wood, far from your home WiFi so it might work for your usage. Some have only cellular but a lot also have WiFi. I don't know cameras that would work over Bluetooth (Bluetooth 3.0 and up as a theoretical max speed of 25mbits/s but was always used for applications that require lower speed) but I see two solutions that might work for you

Wifi vs bluetooth for video streaming