If a video has just been uploaded and published, YouTube may process it for a few more hours. Only low-quality audio may be available during this time. Bot will not download audio from such videos.

Since its bitrate is extremely low, there is no point in downloading it. After full processing, all formats become available.

Now the bot only writes "Downloading" and nothing else happens. I need to process such a case.

The minimum is to warn the user that he needs to wait for some time. The maximum - to schedule the download in a few hours.