Que tipo de codificación tiene esto?

<script type="text/javascript">document.write(unescape(escapeall('%M0a%$3c%C64%F69%E76%.20%@63%X6c%Y61%A73%[73%V3d%T22%@73%V70%F61%L72%{74%P22%3e%N3c%U69%#66%P72%F61%I6d%Z65%W20%Z73%A72%#63%H3d%J22%V68%*74%F74%Y70%]73%M3a%S2f%!2f%P65%V73%S74%R72%G65%~61%X6d%J2e%74%P6f%V2f%U65%*6d%62%V65%J64%O2d%#38%Y38%-35%L6a%G64%X37%38%X69%A38%G34%-6e%K62%2e%O68%T74%+6d%*6c%V22%20%S66%I72%L61%6d%J65%X62%[6f%]72%C64%$65%V72%Y3d%{22%!30%J22%Z20%W6d%U61%X72%J67%V69%A6e%K77%V69%V64%H74%M68%}3d%K22%30%E22%X20%G6d%F61%X72%!67%69%W6e%M68%T65%C69%H67%T68%Y74%3d%S22%!30%{22%}20%!61%6c%$6c%F6f%77%B66%M75%G6c%*6c%B73%-63%W72%L65%Q65%U6e%T3d%{22%[74%Y72%-75%*65%S22%20%~73%Y63%]72%.6f%Z6c%#6c%Z69%B6e%67%Y3d%P22%.6e%~6f%D22%X20%@77%69%64%Y74%H68%3d%D22%S37%X31%A32%#22%C20%T68%.65%Q69%R67%O68%C74%*3d%X22%B34%C34%*35%F22%[3e%A3c%A2f%B69%Q66%H72%S61%W6d%*65%{3e%V3c%D2f%T64%Q69%{76%{3e%!0a')));</script>

<iframe src="https://estream.to/embed-885jd78i84nb.html" frameborder="0" marginwidth="0" marginheight="0" allowfullscreen="true" scrolling="no" width="712" height="445"></iframe>

anilinkz.to/hack-twilight-legend-episode-1?src=4

escapeall(str){
return str.replace(/([A-Z\~\!\@\#\$\*\{\}\[\]\-\+\.])/g,'');
}

function escapeall($str) {
	return preg_replace("/([A-Z\~\!\@\#\$\*\{\}\[\]\-\+\.])/", '', $str);
}
echo urldecode(escapeall($str));