Imported video plays automatically on reclick and mp3 file does not even play at all on play button reclick.

I imported an mp3 file and a mp4 video. At first these files played well but when I moved the selection focus to a text file in the manuscript and then reclicked on the video file, it started playing automatically from the progress bar location where I left the play head. Also, when the mp3 file is reclicked, it doesn’t play automatically, but when I press the play button this time, it does not play at all. Please fix these issues.