'preference' is to be used only when the format is better that ALL qualities of a lower preference irrespective of ANY sorting order the user requests. See deezer.py for correct use of this
In the older sorting method, `preference`, `quality` and `language_preference` were functionally almost equivalent. So these disparities doesn't really matter there
Also, despite what the documentation says, the default for `preference` was actually 0 and not -1. I have tried to correct this and also account for it when converting `preference` to `quality`
Video postprocessors are also turned off when this option is used
Co-authored-by: shirtjs <2660574+shirtjs@users.noreply.github.com>
Co-authored-by: pukkandan <pukkandan@gmail.com>
