disable next bottun

Hey,

I have a block with two questions.
The first question is a video that playing automatic and when the video is ended its moving auto to the next question in the same block
my problem is in the next question.
The in the next question is doing also auto submiting - even if i dont want to.
what to do?

in the on ready function (of the first question) I have this:

jQuery($('videoPlayer1')).on("ended", function() {
setTimeout( function () {
m1.clickNextButton();
}, 1000);