when i connected to the link provided, the videos did work for me. however, they don't lead to full episodes of the old shows, so aren't of much use for step-by-step learning.
Alex joined forces with Ricky Tims a few years ago, after her contract expired with HGTV. their new site offers a selection of features. some of them can only be accessed with a paid membership. if you fish around, you can also find some things available free of charge.
http://www.thequiltshow.com/