Hi been flying tello for abput 2 weeks not always it keep losing wifi signal or lose video or lose connection am i doing something wrong i fly right now in low light because is winter
Other WiFi networks, bluetooth and other 2.4Ghz devices can cause a lot of interference with the Tello. If you can, try and turn off anything else that is WiFi whilst your flying.
Alternatively, get yourself a Xiaomi Mi WiFi Extender. These do wonders for signal strength, and video quality.
A wifi extender will give you much more "cleaner" signal and video, but it is advisable to get away from others' WiFi interference and antenna repeater etc.