I NEED SOME TECH HELP

Hey guys ... I need some help! Can anyone please help explain how to upload a short video to my profile or showcase? I am totally not tech savvy so any help would be greatly appreciated and any explanation given would be greatly appreciated if given in the simplest terms possible, lol. You can text me at 2149895218 or email me directly at Ravenrayne27@gmail.com. Thanks in advance!