Scan ReplayGain for normalized loudness

[Svk1190]

Problem
Many YouTube videos have different levels of loudness. If a user is listening to several music videos in low volume, but a subsequent video has abruptly high volume, then it creates an unpleasant situation for the user. So it would be preferred to normalize the volume of all videos that are playing sequentially.

Solution
When user plays a video from a playlist, or if videos are auto-played, VueTube can compute the ReplayGain of the upcoming video, such that the next video has the same level of loudness.

Alternative
I use Foobar2000, and use the foo_youtube component to add multiple YouTube videos in the form of a playlist, and use the ReplayGain scanner to normalize the volume of all videos in the same playlist, as shown below.