I've edited a video from my phone, however I cant seem to get rid of the black bars on the sides. When I try to render in 4:3 instead, I end up with the 'wasted' track only taking up the center of the film https://gyazo.com/34ecd8ff2b4cce0300cc37ce0c9852f9 like this. How do I render it to just get rid of the black bars? I know that on youtube I probably cant get rid of the black bars, but I want to save the video on my phone and use it there.