Most camera sensors already detect in the IR range, you just need to remove the filter. I've done it, works great and pretty fun to convert some old webcams, robot vacuums lidar scanners look especially cool.
Clouds also don't save you (unless you have two thick layers to fly through) because this technique is even easier with satellites. Stealth effectively no longer exists for most nation-state level tech. The B-2 is a very cool plane but is unfortunately obsolete. Still great for when you want to put on more of a show than an attack.
Blurry video is fine when using techniques like this: https://www.youtube.com/watch?v=m-b51C82-UE
Clouds also don't save you (unless you have two thick layers to fly through) because this technique is even easier with satellites. Stealth effectively no longer exists for most nation-state level tech. The B-2 is a very cool plane but is unfortunately obsolete. Still great for when you want to put on more of a show than an attack.