This change ensures that the optional fileName variable contains valid characters.
Reason: the user may extend the video title that they use for the file name. In that case the video title could have characters that are not valid for the operating system.
This change ensures that the optional fileName variable contains valid characters.
Reason: the user may extend the video title that they use for the file name. In that case the video title could have characters that are not valid for the operating system.