In order to provide a better user experience, the text input widgets on top, i. e. "YouTube URL/ID", "Output Directory", "Filename Override", "Proxy", should be disabled as soon as the user clicks the "Download" button in order to make it clear to the user that those parameters are not mutable anymore at that point. Actually all of the current widgets should be disabled, not only the text input widgets.
In order to provide a better user experience, the text input widgets on top, i. e. "YouTube URL/ID", "Output Directory", "Filename Override", "Proxy", should be disabled as soon as the user clicks the "Download" button in order to make it clear to the user that those parameters are not mutable anymore at that point. Actually all of the current widgets should be disabled, not only the text input widgets.