Why do my smart home devices keep disconnecting from the internet?

I totally feel your frustration, I've been there too with my own smart home devices. The disconnections can be really annoying, especially when you're relying on them to work smoothly. I think you're on the right track by suspecting a bandwidth issue, especially since you've noticed the disconnections happen more often when you have multiple devices streaming video at the same time.

Your router might be working fine, but it's possible that it's struggling to handle the amount of data being transmitted by all your devices. You might want to check your router's settings to see if you can prioritize certain devices or applications, or even consider upgrading to a more powerful router if you have a lot of devices connected. I'd also recommend checking the firmware on your router and devices to make sure they're all up to date, as this can sometimes resolve connectivity issues.

Another thing you could try is moving some of your devices to a different network, if your router supports it. For example, you could create a separate network for your security cameras or other devices that don't need to be on the same network as your streaming devices. This can help spread out the bandwidth and reduce the load on your main network. I've found that this can make a big difference in reducing disconnections and improving overall performance.

I hope these suggestions help you troubleshoot the issue and get your smart home devices working smoothly again. If you're still having trouble, you might want to consider reaching out to the manufacturer of your devices or your internet service provider for further assistance. Good luck, and I hope you get everything sorted out soon!