To anyone having issues with Camera connectivity and "Video dropping." Highly recommended trying these steps:

I was trying to troubleshoot my cameras always disconnecting during "event" triggers, like secret alert, entry sensor open etc. and was having horrible luck with the usual recommended troubleshooting. Decreased video resolution, made sure all my devices were on a separate 2.4ghz network/wifi-extender etc. was getting ready to throw in the towel when I happened to stumbled on this guide in a google search. I tried the steps suggested here by making the configuration changes to my router and it fixed my issues completely. No more dropped videos during events (so far). 

Try it and see for yourself. Maybe SimpliSafe has these steps outlined somewhere, but I sure couldn't find them. And for how much a difference they made, SS really needs to consider adding them to their "official" troubleshooting steps. 

Here is the guide:

Step 1: Realizing that modems and routers have settings. They are selected by default to make setup easier for you, but obviously can cause issues as devices change over time. Typically newer things work better together, but even that is not necessarily always true. Some modems and routers are combined in one device, but typically separating them will have the best performance. So a simple first step is buying a separate modem and router. There's also another bonus hidden in this step: did you know that if you don't have your own modem, you're currently "leasing" it from your ISP (Comcast, Spectrum, WOW etc)? Buying your own, you can reduce your ISP bill, and be net positive in as little as 1 year. And again, typically the performance will be better. A modem like an Arris SB6190, and for the router an Asus AX1800 is a fully capable and up to date combo if you're looking to save money over time and take control of your internet and network.

Step 2: Whether you've upgraded or not, you now need to know what your hardware is, and be able to connect to it to optimize your wifi settings for your video devices. It is the router that controls these, not the modem, unless it is a combo device. Most routers have a GUI these days, so you simply connect to your router with your browser, by inputting its local IP and putting in its default username and password as a login. Some routers have even implemented external domains to make connecting to their routers easier, like Asus. Still, I don't intend to make this a full on step by step guide to learn how to connect to your router. Those guides exist already, here's one:

https://www.pcmag.com/how-to/how-to-access-your-wi-fi-routers-settings

Step 3: After we're connected to the router, we can now modify router settings to be more stable/performant for SimpliSafe video devices. This is the main point of the post. Anyway, let's still go over the basics of these devices, because even people that haven't tried to set their devices up yet could be seeing this thread.

Firstly, we should all know that these devices only connect on the 2.4ghz band. Because of this, and because you're most likely here to gain connection/better performance, you should do some network reorganizing. All devices that you CAN get on 5ghz, should. I would start by doing that now. You want to do this to avoid interfering with the devices on the 2.4ghz band as much as possible, and you can only do that by switching them away. Also, hardwire all devices you can manage to get a wire to instead of wireless. It's better performance for that device anyway, but also by proxy improves the connection for all wireless devices, by freeing up airspace!

After the way has been paved for our video devices, we will now change router settings. The tricky part about this section is that, I can tell you right now, routers have different names for different things, and they're even in sections that are named differently. So as much of a pro that I am, I can't really guide you to names and buttons specifically. The silver lining though is that most things have a mostly similar name, if not actually the same, but getting there and using a bit of deduction will most likely be required.

When you're in the router, try to find the Wireless settings, then make sure you're under the settings for the 2.4ghz band, as they will have their own specifics. There are two in particular that we can change right now, that may solve all your issues. We will start there, it's just that they may be somewhere weird. Sometimes these settings are in the more general section of the wifi settings, sometimes they are in the deeper settings. Look for something like:

1. Channel/Control channel

2. Channel bandwidth

Most modern routers have an Auto for both of these settings, and I believe that it is what messes with the firmware of our devices the most. I think the router is trying to make positive changes on the fly, and the devices are freaking out in response. I recommend changing the bandwidth to a static 40mhz, since they can work at that speed (unless your environment is especially noisy (apartments with tons of wifi everywhere), you could try 20mhz), and for the channel I recommend using channel 11. The best channels to use in general are 1, 6 and 11 anyway, as they are the only ones that don't overlap with each other AT ALL on the 2.4ghz band. However as I said earlier, most routers try to choose one automatically. If we assume everyone else's is, which is very likely, the routers will try to start at channel 1 and work up if there's too much interference. You might as well try to take the back end of the spectrum with 11, and this is especially true if you don't live in an apartment, or somewhere with a lot of congestion. But even then, it's still true.

After I changed just these two settings, my devices now perform beautifully. But here are some other settings to consider that I offer as notes, or best practices, if you want to try to attain max performance for your devices.

1. Hiding the SSID doesn't seem to hurt them, so go ahead and do that if you want. It seems to cause problems with random devices I have sometimes, which is very unfortunate, so I don't have mine hidden.

2. Disable any kind of roaming assistant if it happens to be on.

3. Disable "Agile Multiband" or similar.

4. *Edit: Preamble Type: Long, unless your devices are very close to the router/extender/mesh node they're attached to, then try Short. Short is ideal, but I'd imagine most people need to use Long, again, unless you have your AP's very close to the SS devices they're connected to. Like within 2 rooms close, ideally the same room. So 15-20 feet max.

5. *Edit: RTS threshold should probably be left at default, most likely 2347 on your router. Initially I recommended lowering it. It seemed to be playing well with both devices, especially the indoor cam, but eventually issues with the door bell lingered around that changing this back fixed.

6. Beacon Interval could be reduced to 50 or 25, similar reasoning to RTS threshold. Not sure if this is going to do much for you, though. YMMV.

7. Disable TX bursting, UNLESS you have older devices that need it. You'll know if you need it by disabling it and then checking all your currently connected devices, seeing if they still work :).

8. *Edit: I have Universal (also known as Implicit) Beamforming enabled, but not Explicit, nor MU-MIMO enabled. Originally, I had all disabled. I'm not so sure it's helping my SS devices, but it seems to help some other devices I have without hurting the SS, thus the enabling.

9. Also, obviously set TX power to the highest setting, if your router exposes that.

Credit to "bryce986" on reddit for originally posting this: https://www.reddit.com/r/simplisafe/comments/vnoxju/wifi_settings_best_practices_for_video_devices/?utm_source=share&utm_medium=web2x&context=3