How do I append '@' sign to string in javascript

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Javascript

jQuery

var result = "Url.Content(~\\Content\\Documents\\"+data+")";

I want to append the '@' sign to result

output should be

var output= "@Url.Content(~\\Content\\Documents\\"+data+")";

I am using javascript function

 function PlayVideo(e) {
        e.preventDefault();
        var dataItem = this.dataItem($(e.currentTarget).closest("tr"));
        var tData = dataItem.POnePagerId;
           var GetVideoLinkLink = "@Url.Action("PlayVideo", "ProviderOnePager")";
                $.ajax({
                    url: GetVideoLinkLink,
                    type: "GET",
                    dataType: 'html',
                    contentType: 'application/x-www-form-urlencoded; charset=UTF-8',
                    data: {
                        'POnePagerId': tData
                    },
                    success: function (data) {
                         video.center().open();
                        debugger;
                        
                        var result = "Url.Content(~\\Content\\Documents\\"+data+")";
                       
                        var mediaPlayer = $("#mediaPlayer").data("kendoMediaPlayer");
  // check the currently loaded media
/* The result can be observed in the DevTools(F12) console of the browser. */
  console.log(mediaPlayer.media());
  // change the media loaded in the widget
  mediaPlayer.media({
                title: "Responsive Website Delivers for Reeves Import Motorcars",
                source: [ { url: result }, { quality: "720p", url: result } ]
            });

              
                    }
                });
    }

in the ajax success I want to pass the video location to kendoMediaPlayer as source the video location is

\\Content\\Documents

and the video name test.mp4
the

kendoMediaPlayer 

accepts source only like

@Url.Content(~\\Content\\Documents\\test.mp4

What I have tried:

i have tried but in js file @ sign throwing error