Issue with videos after tapping screen more than once

[Sciberrasluke]

Hi, so let me just start off by saying I'm not a developer. I'm an art student studying fashion communication. I'm working on an AR publication using MindAR and have a small issue with my app. From what I've learned, users must register a single tap for videos and audio to start playing. That's fine, however, if more than one tap is done, video content gets stuck in position on the screen and doesn't track or disappear when moving to different targets. The link to my project on glitch is below if you would like to see my code. I'd appreciate any help!

https://glitch.com/edit/#!/unreal-realities-test