Сергей Мельников

this.$http.get(this.apiURL)
    .then(function (response) {
      return response.json();
    })
    .then(function(obj) {
      console.log(obj.data)
    })

{
  "javascript": {
    "st": 1,
    "st2": 2
  },
  "res": {
    "par1": {
      "par2": 212
    },
    "js": 2123
  }
}

var str = "javascript.st =1 \
javascript.st1 = 2 \
res.par1.par2 =212 \
res.js =2123";

function parser(str) {  
  var rgxp = /([\S]*)\s?=\s?(\d*)/g,
    result = {},
    substr, keys, parents, i;
  while (substr = rgxp.exec(str)) {
    substr = substr[0].split("=")
    keys = substr[0].trim().split(".")
    parent = result
    for (i = 0, ln = keys.length; i < ln; i++) {
      parent[keys[i]] = parent[keys[i]] || {}
      i == (ln - 1) ? (parent[keys[i]] = substr[1].trim()) : (parent = parent[keys[i]])
    }
  }
  return result
}

JSON.stringify(parser(str))
// {"javascript":{"st":"1","st1":"2"},"res":{"par1":{"par2":"212"},"js":"2123"}}

$.ajax({
  url : '****',
  type : "GET",
  dataType : "jsonp",
  success : function(msg){
    var videoparam = [msg.response['url240'],msg.response['url360'],msg.response['url480'],msg.response['url720']];
    callOtherFunction(videoparam);
  }
});

function callOtherFunction(videoparam) {
  /* здесь работаем с массивом */
}

{
  "new":"asdsa",
  "list":
    [
      {
        "name":"first",
        "rating":"50%",
        "story":"Once upon a time"
      },
      {
        "name":"second",
        "rating":"65%",
        "story":"New chapter"
      }
    ]
}

$.getJSON('data.json', function(data){
  console.log(data);
});

/*
data - полученный ответ от сервера
*/ 
var result = [];
for (var i = 0; i < data.length; i++) {
  var obj = {};
  obj[data[i].name] = data[i].value;
  result.push(obj);
}
console.log(result); 
// результат
/* [{"assigment":"1"},{"subject":""},{"title":""},{"description":""},{"`pages":""},{"sources`":""},{"id_writer":""},{"discount_code`":""},{"email":""}]  */