poke/html/video-error.ejs

<%
  function isValidYouTubeID(v) {
    return /^[a-zA-Z0-9_-]{11}$/.test(v);
  }

  function isLetterSpam(v) {
    return /^(.)\1+$/.test(v);
  }

  let reason;
  
  if (!isValidYouTubeID(v) || isLetterSpam(v)) {
    reason = "Video not found >~<";
  } else {
    reason = "trying again...";
  }
%>

<%- include('./layouts/error-video.ejs', {
  error: "oops - loading failed :c",
  description: `${reason}`
}) %>