it wont download any of the videos im trying to download :(

im putting the url in as it says for me to do and it just wont work, ive tried multiple other videos and other qualities such as 128kb/s and etc but it still wont work :( anyone know why?

https://preview.redd.it/4eps9f77lvoe1.png?width=1277&format=png&auto=webp&s=8d115a94fc578545c1c5d3c888b143ee8d99acaa