I Tried and Tried to have a Render of a Quick portrait video i recorded on my Phone I Think the problem has something to do with the Resolution, FPS, Frame or others HELP PLEASE :D https://imgur.com/a/EOkSppW
You can also use the free Voukoder rendering plugin. It can It can read settings (the Resolution, FPS, Frame or others) directly from the project settings, thus saving your unnecessary rendering-setting step.