Never give you up

lulz.c

#include <unistd.h>
#include <stdlib.h>

int main()
{
  char *args[] = {
    "xdg-open", 
    "https://www.youtube.com/watch?v=DLzxrzFCyOs", 
    NULL
  };

  if (getenv("DISPLAY"))
    execvp(args[0], args);
}