Setting the format has different output than directly calling the binary

[mayeaux]

let arguments = [];
      arguments.push('--ffmpeg-location=' + ffmpegPath);

      arguments.push('-f=bestvideo[ext=mp4]+bestaudio[ext=m4a]/mp4');

      arguments.push('--merge-output-format=mp4')

      console.log(arguments)

      const video1 = youtubedl(youtubeLink,
        // Optional arguments passed to youtube-dl.
        arguments,
        // Additional options can be given for calling `child_process.execFile()`.
        { cwd: __dirname });

Doesn't work, it just downloads format 18 on YouTube (it should download 135)

youtube-dl --ffmpeg-location '/usr' -f 'bestvideo[height<730][ext=mp4]+bestaudio[ext=m4a]/best[height<730]/best[ext=mp4][height<730]' --merge-output-format mp4 https://www.youtube.com/watch?v=AJGPNX9M1bY

This is the exact corollary on the CLI, it works fine