You have the fastest NBN, why the video is choppy stutter when watching wirelessly? What is going on? And What has gone wrong? Usually when you sign up with NBN, beside the installation service they will also provide you with an NBN Modem and a router. The NBN Modem is fine and cannot be changed but the router could be the main problem. Usually the router that is included with NBN bundle from your telco company is only a very basic router. It can only handle 1 Full Hd stream at most wirelessly in a straight line of sight, or 2 when plug in via Network LAN cable.
A router is like a mini computer handles only your internet traffic request.
For a very basic simple router like the router that your Telco provided, it cannot handle multiple stream of download of information (video / sound information).
Imagine there are several member in your household, each person is watching several different content, it creates a lot of stress and workload on your router. On top of that, you have your microwave and many mobile phones that may share the same frequencies with the WIFI. (2.4hz) It create so many interference to your wireless stream. Beside a very good wireless adapter / dongle system. (The big 4 we recommend), you also need a good router like the one above: It helps distribute the flow of data to multiple devices simultaneously. Beside OFDMA and MU-MIMI, they can also do WIFI 6, which is the latest version of WIFI protocol, WiFi 6 (802.11ax) provides up to 4X greater network capacity and efficiency in traffic-dense environments. Previous-generation WiFi 5 (802.11ac) can only handle one device at a time on each network channel, which is an inefficient use of available bandwidth. OFDMA support in the WiFi 6 divides each channel into small sub-channels, allowing signals from multiple devices* to be bundled together and transmitted simultaneously, reducing latency for a smoother, more responsive WiFi experience.