The link you are referring to is temporarily down and should be back up on Workout Builder by the end of the week! We have been updating Workout Builder to make it more efficient for you.
If you do not see the link to add your custom videos please contact me and I will assist you! My email address is [email protected] and my phone number is (800) 999-4332 ext 287.
Please let me know if you need anything else!