You will need to make another texture (b&w or greyscale) and apply it to the “Emit” channel. Just take the texture images for the ships into photoshop, make a new layer over the top of them and fill it with black. Then paint white onto any areas that will glow (the windows, power cells or anything else you’d like to be lit up). Then save the texture as a new file so that it’s just black and white without any of the ship’s texture showing.
It’s easier to do this if you use “lighten” or “overlay” on the layer you’re painting on (the emit layer). Then after you’ve painted the white parts, set that layer to “normal” and save the image file that way. The models look nice in your videos.
Also, the game is probably already using a glow or emit channel in their textures already, so maybe check to see if you don’t already have them.