I have a better solution...just extract the audio from whatever version has audio already, then add it to the version you want, it is very simple thing to do in VLC player.If you're implying that there's a voiced version for the original video, you can just extract the audio from said voice version and then watch the x-ray video using mxplayer or mpc whichever platform video players that have option to play or add external audio to a video lol.