loadVideos(videosArray, texturesOptions = {}, successCallback, errorCallback) {
        for(let i = 0; i < videosArray.length; i++) {
            this.loadVideo(videosArray[i], texturesOptions, successCallback, errorCallback);
        }
    }
Loads an array of videos

     params :
     @videosArray (array) : array of html video elements
     @texturesOptions (object, optional) : Parameters to apply to those textures (see Texture class). Will be merged with the mesh default textures options
     @successCallback (function): callback to execute on source loading success
     @errorCallback (function): callback to execute on source loading error
*