mediaElement does not work on jlPlayer

Question

hello I’m using the using the jlPlayer and I have this video code:

    <video preload="none" class="jlplayer-video" id="MY_VIDEO_1" onended="refresh()">
        <!-- <track kind="captions" src="legenda.vtt" default> -->
    </video>
    <img src="img/logo.png" width="100" class="logo">
</form>

*remembering the source of the video I set by javascript * until then everything more problem is using mediaElement because this script I made does not work:

var mediaElement = document.getElementById('MY_VIDEO_1');
        var date = new Date();
if(date.getMinutes() == 0){
mediaElement.currentTime = 0;
}
if(date.getMinutes() == 1){
mediaElement.currentTime = 60;
}

someone can tell me what’s wrong?