let url1 = 'https://www.youtube.com/watch?v=6su62xI2x2Q';
let url2 = 'https://www.youtube.com/watch?v=oi8ArKYRwBY&list=RDUYEJGCQU_v0&index=20';
let search2='?v=oi8ArKYRwBY&list=RDUYEJGCQU_v0&index=20';
function noCacheString(s){return (s+' ').slice(0,s.length);}
/https\:\/\/www\.youtube\.com\/watch.*[\?\&]list=[\w\-\_]+/.test(noCacheString(url2));
(new URLSearchParams(noCacheString(search2))).has("list");