@polesye When using JQuery's end(), I think it is more understandable if you indent as following:
```
this.el
    .find('.video-player div')
        .addClass('hidden')
    .end()
    .find('.video-player h3')
        .removeClass('hidden')
    .end()
    .addClass('is-initialized')
    .find('.spinner')
        .attr({
            'aria-hidden': 'true',
            'tabindex': -1
        })
    .end();
```