- yt needs to be in the same directory as the ytplay script. - In ytplay, you need to call the yt script with ../yt because ytplay creates a video search directory and changes into it before doing anything else. - yt needs to be executable. - You have to comment out any 'mplayer' and 'rm' lines in yt, so that it only downloads a video, instead of downloading, playing and deleting a video.