Below you will find a link to download the Twitch VOD Downloader, this supports the new HLS highlights/past broadcasts and old past broadcasts.
This is the program - it is a very simple looking program, with labels detailing what needs to be done. The program can auto detect whether or not it is a new or old VOD.
Download progress is tracked in real time through the use of a progress bar - please note that downloads have to be 100% complete before you are able to view them
Instructions for use: