<button data-frame-load="test">Загрузить</button>

<iframe data-frame-group="test" data-frame-src="//cloud.tvigle.ru/video/5719602/?playerId=303&amp;partnerId=10468" frameborder="0"></iframe>
<iframe data-frame-group="test" data-frame-src="//cloud.tvigle.ru/video/5719601/?playerId=303&amp;partnerId=10468" frameborder="0"></iframe>

<button data-frame-load="gahsjd">Загрузить</button>

<iframe data-frame-group="gahsjd" data-frame-src="//cloud.tvigle.ru/video/5719602/?playerId=303&amp;partnerId=10468" frameborder="0"></iframe>
<iframe data-frame-group="gahsjd" data-frame-src="//cloud.tvigle.ru/video/5719601/?playerId=303&amp;partnerId=10468" frameborder="0"></iframe>
[...document.querySelectorAll('[data-frame-load]')].forEach(button => {
  button.addEventListener('click', () => {
    const group = button.getAttribute('data-frame-load');
    [...document.querySelectorAll(`[data-frame-group="${group}"]`)].forEach(frame => {
      frame.setAttribute('src', frame.getAttribute('data-frame-src'));
    });
  });
});

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