The rendered video tells us nothing about your workflow or your settings. Try embedding a screenshot showing the waveform on the audio layer (ll) and the modified properties of the layer with Audio Spectrum applied (uu). Without that information, there is no way to point you to any solution other than try adjusting the settings or the audio levels.
* The "Drag & Drop here..." area is buggy and should not be used to share images. Please use the toolbar or just drag your images to the reply field.