https://www.arkadbudapest.hu/_assets/40dc3619f630dcb605c4bc36aaa03f0e/vendors/iosVideo-helper.js

1if (document.querySelector('video')) {
2	const video = document.querySelector('video');
3	var isIOS = /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
4	var isSafari = /constructor/i.test(window.HTMLElement) || (function (p) {
5		return p.toString() === "[object SafariRemoteNotification]";
6	})(!window['safari'] || (typeof safari !== 'undefined' && window['safari'].pushNotification));
7
8	if (isSafari || isIOS) {
9		var videoSrc = video.getElementsByTagName("SOURCE")[0];
10		videoSrc.setAttribute('src', videoSrc.getAttribute("src").concat('#t=0.1'));
11
12		if(isIOS) {
13			video.setAttribute('preload', 'metadata');
14		}
15	}
16}