Video (including Dolby content) has the audio mixed differently (6 to 12 dB quieter) compared to the BluOS Controller App's music service two-channel audio, producing a difference in volume levels. This variation is dependent on the source and format.
You can create Presets in the BluOS Controller App as a workaround, with the required volume level for your favorite radio station, music streams, playlists, or sources. For more information, refer to our Help Center article.