YouTube playlist auto-configuration tool

main.gs

/**
 * # Usage 
 * 1. start a new Google Apps Script project and paste this code into the script area.
 * 2. After saving, set the `main()` function to be executed automatically.
 * # Operation
 * 1. Create a playlist.
 * 2. Set the title of the video you want to add to the playlist as "Playlist Name:Video Title"(Colons can be full-size or half-size).
 */
function main() {
  // Get the necessary items (own channel object, playlist list, video list).
  const channel = YouTube.Channels.list(["snippet"], {
    "mine": true
  })["items"][0];
  const playlists = YouTube.Playlists.list(["snippet"], {
    "mine": true
  });
  const videos = YouTube.Search.list(["snippet"], {
    "channelId": channel.id,
    "order": "date",
    "maxResults": 50,
  });
  // video foreach
  Array.from(videos.items).forEach((v, i) => {
    Logger.log(`>> ${v.snippet.title}`);
    // Category Extraction
    const cn = v.snippet.title.split(/[:：]/);
    if (cn.length == 2 && cn[0] && cn[1]) {
      // Does the category name exist as a playlist?
      const pl = playlists.items.find(item => item.snippet.title == cn[0]);
      if (pl) {
        Logger.log(`Category:${cn[0]}`);
        // Is the video already on the relevant playlist?
        if(YouTube.PlaylistItems.list(["id"], {
            "playlistId": pl.id,
            "videoId": v.id.videoId
          }).items.length == 0){
            // Subscribe to the playlist!
            Logger.log(`Since the video is not in the list, add it.`);
            const res = {
              snippet: {
                playlistId: pl.id,
                resourceId: {
                  videoId: v.id.videoId,
                  kind: 'youtube#video'
                }
              }
            }
            YouTube.PlaylistItems.insert(res, ["snippet"]);
            Logger.log(`Success`);
          }else{
            Logger.log(`The video is already registered.`);
          }
      }
    }
  })
}