Incorrect video and audio qualities values on YouTube Downloader panel

[jeanslack]

Switching between "Best quality video" and "Worst quality video" during the combo box selection, gives incorrect values and leads to a "Request format is not available" error.
This kind of error occurs when the "default" setting and the "Download splitted audio and video" setting are selected.

Solution:

replace

VQUALITY = {('Best quality video'): ['', ''],

with

VQUALITY = {('Best quality video'): ['best', 'best'],

on youtubedl_ui.py file.