9.12.2 Seems to be slow comparing to other RTSP FFMpeg streams on Cellular
<!--
Please DO NOT DELETE THIS TEMPLATE or your issue may be closed immediately.
Before opening an issue, search for open and closed GitHub issues that match your situation.

PLEASE THOROUGHLY READ https://github.com/dgreif/ring/wiki/Camera-Troubleshooting#live-stream-troubleshooting BEFORE OPENING AN ISSUE

**Please Note**: Live streaming issues are extremely difficult to diagnose and reproduce.  If you have followed all of the advice in the wiki and still have issues, there is likely nothing that I can do for you.  Please only open an issue if you have a deep understanding of the network issue and have an actual suggestion for how to fix it.
-->

# Live Streaming Issue

### Describe the live streaming issue
When I am on LTE cellular, all the feeds from Ring cameras would take almost 10 to 15 seconds to display the snapshots of each of my 4 Ring cameras. But all of my 12 RTSP cameras' snapshots would show up in 1 to 2 seconds. My firewall at home would alert me that my Apple TV 3 is streaming directly to my iPhone. Just wondering if this is the case that, the Apple TV is doing the actual streaming of all of my Ring Cameras feeds to my phone. If so, how can I improve the performance and speed of showing the snapshots and Ring video feeds? Would upgrade to HomePod or Apple TV 4K would help? or would upgrade of the Raspberry pi to a 8 core Linux help?

### Screenshots/Logs
<!-- ✍️edit: --> If applicable, add screenshots and log output to help explain your problem.

### Recommended solution
<!-- ✍️edit: --> Please describe what you think is causing this issue, and how you recommend it be fixed

### Environment
<!-- ✍️edit: -->
 - Ring Camera: Ring Doorbell Pro and Wired Stick Up Outdoor Cam
 - OS: Raspbian
 - Node.js:  12.14.1
 - NPM: 6.13.4
 - homebridge-ring (if applicable): 9.12.2
 - homebridge (if applicable): 1.6.1
 - hoobs (if applicable): N/A

### Network Environment
Apple TV 4, Raspberry pi 4, all GigE, no Wifi. The Stick up Cams are PoE, and Ring Doorbell Pro is wired with 16v.
