Alchemy.Voice.play_url

You're seeing just the function play_url, go back to Alchemy.Voice module for more information.
Link to this function

play_url(guild, url, options \\ [])

Specs

play_url(snowflake(), String.t(), audio_options()) :: :ok | {:error, String.t()}

Starts playing audio from a url.

For this to work, the url must be one of the supported sites. This function does not check the validity of this url, so if it's invalid, an error will get logged, and no audio will be played.