Yeah, this smells very much like youtube-dl: $ strings -e l Utubster.exe | grep best bestaudio/best bestvideo[ext=mp4]+bestaudio[ext=m4a]/best bestvide

Yeah, this smells very much like youtube-dl: $ strings -e l Utubster.exe | grep best bestaudio/best bestvideo[ext=mp4]+bestaudio[ext=m4a]/best bestvideo[ext=mp4][height<=1080]+bestaudio[ext=m4a]/best[height<=1080] bestvideo[ext=mp4][height<=480]+bestaudio[ext=m4a]/best[height<=480] bestvideo+bestaudio/best