I've finished my outro today and when I tried to render it as an .mp4, in the rendering screen there weren't any options that allowed me to render it with a video format. Please help!!
Nobody can help you without system information and otehr details like document dimensions, color modes, timeline settings, render settings and so on. You could have used some weird combination of stuff, you could have a problem with your system's CoDecs. We can't know based on your non-information.