Double Layer and a Nero Question?

Two questions, how do I burn a double layer DVD with Nero?

Also, how do I burn videos on my computer to DVD using Nero? Cant find the option for it…

The same way you’re doing with SL medias, hit the button if you’d like in Burning Rom bottom right corner to DVD-9, and video files you mean DVD video files? If so just select the option DVD-Video then drag&drop your files to the video_ts folder and burn.