Hello @k55 and welcome to our beloved Candy Crush Friends Community!
I believe this is due to the fact that the studio is constantly reviewing how many moves on average it takes players to complete levels. If a level appears to be too easy such as when players regularly have many excess moves by the end of levels they reduce those levels move counts accordingly. π€
Unfortunately sometimes they may reduce the moves after example videos are made showing these levels completed before studio tweaking. For this my only suggestion is to either be patient and wait for a new video, or perhaps try different characters or strategies than before. π
Best of luck in beating those challenging levels and have a crushtastic day!