How to stream videos to Micromax LED TV using my Android phone?

You will need HDMI cable in order to connect your TV to Android device.

Once you have HDMI cable. Connect one end of HDMI cable to TV socket and another one to your Android device. As this complete successfully, you can now choose which files you want to project on the TV screen.

You have asked about streaming videos. So for this you will find one option called "Mirror on display". This function will project everything on TV screen whatever you are seeing on your device.