Userscript keeps scrolling/snapping to iFrame multiple times, until click trigger is fired

I made this fairly simple userscript to download videos on gametrailers.com without having to navigate to each page individually (see comments for clarification, because the code is ugly, jQuery, and unreadable):

var doIt = function(){
  // Look for video list container 
  var results = $(".line_listing_results");
  // Iterate through each listed video
  results.children().each(function(key, vidElem) { 
     // get url to individual video page
     var url = $(vidElem).find('.thumbnail').attr('href'); 
     // some style for the download button
     var styles = 'width: 4.875em; height: 1.5em; cursor: pointer; background-color: #3a8eb7; color: white; padding: 0.3em; font-size: 1.5em;' 
      // Append a download button to each thumbnail and bind a click
      $(vidElem).append('<a id="dl-'+key+'" style="'+styles+'">Download</a>').click(function(clickElem){ 
       // Create iFrame (problem is here)
       var iframe = $('<iframe src="'+url+'#mod_j8j95m" frameborder="0" scrolling="no" id="iframe-'+key+'"></iframe>')
       // Insert iFrame
       iframe.appendTo('#dl-'+key)
       // Bind 'onReady' to iFrame 
       $('#iframe-'+key).load(function(iElem){
         // Click the download button
         $('#iframe-'+key).contents().find(".download_button").trigger("click");
       }.bind(this))
    }.bind(this))
  }.bind(this));  
};
$(document).ready(function(){
 doIt();
 })

The problem is that the main video page keeps snapping to the iFrame when I include the #mod_j8j95m in the url, when I scroll down to click another video/download button. The thing I can't explain, is that this happens multiple times (Chrome). So when I scroll down it will snap back to the iFrame in a certain interval (1 or 2 seconds, not clear).

The reason why I'm including the #mod_j8j95m is I want to lighten the load on the page, because it is heavy as it is (especially since they embedded a youtube video (which I blocked the frame for with adBlock, which fixes dozens of bogus requests to chromecast, which would slow down the loading of the website to snail-speed)). But it seems it actually loads the whole page anyways, just filters out that id

So, a couple of questions:

1. Why is it snapping/triggering the id multiple times?


2. Is there a way to only load a part of an iFrame? (even just the download button would be enough in this case, or just the download url)


3. And why does the snapping stop, once the click has been fired?