Users.csv file is not neccesary if you only want to download a certian users videos. I use it to download all users in my leagues videos. If you don't want to use it some code will need to be edited to not ask for a variable.
You can change the loop to look at any clips from any game, or other games depending on what you set.
More info here:
https://www.reddit.com/r/halo/comments/3skt9c/xbox_one_game_clips_download_script/