Thanks for bringing that to our attention. I assume that the page which those videos exist on will be replaced with the new videos which are being produced.
Here is the HoldemManager youtube channel NoteCaddy playlist: https://www.youtube.com/playlist?lis..._iqNzaE5g8EdMV
We've also got some good FAQ/Tutorial articles here: https://support.holdemmanager.com/support/product/12
Thank you very much ^^