TODO:

key: + = to add, - = to remove, x = completed, # = comment

xAdd option for multiple audio formats
+Dynamic libraries
+Create custom url entry dialog
+Create dialog asking to play finished file or not
+Fix FFMPEG MARQUEE bar
xMake cancel button exit in url dialog
xFix progress bar cancel button
xDisplay current action in progressbar instead of youtube link itself
xUrl validation
xplace spaces in file name with dashes/underscores
xAppend extensions to file name in save dialog unless exists
+Percentage in progress bar --- not possible with iUP
#possibly more later