Export for youtube

hello, i need some help because at the beginning i was able to export videos to mp4 for youtube,
but now, when i want to export, with any settings, that don’t work and the downoad can’t begin.
can you tell me how to fix this problem please.

Perhaps you can re-load the youtube preset.

  1. open export
  2. select youtube in the preset list (left)
  3. press “export file” button at bottom of pane.

These settings work well for youtube.
Once the file is exported you can check that it works by playing it.