I'm using the windows live essentials 2012 I believe.
When I create a new folder and copy videos to it from another using Windows photo gallery, the videos copy to the folder and can be seen outside of the gallery but I cannot see them in the new folder when opened in the gallery.
Usually using F5 will refresh the page, Re-generating wlpg photo cache, http://support.microsoft.com/kb/944221/en-us Traditionally a user would use Cut and Paste to prevent duplicates from being created. After looking at your other thread If you click on the Blue file button and click on Include folder/ Navigate to the location where you made the new folder and click on Include folder.
My Computer
At a glance
Win-7-Pro64bit 7-H-Prem-64biti7-5930K 2nd i9-9940x both water blocked VRM'...Trident-z 3200C14 2nd Trident-z 3600C16EVGA 1080ti ftw3 2nd Titan Xp both water blocked
Computer type
PC/Desktop
Computer Manufacturer/Model Number
Custom assembled by me :}
OS
Win-7-Pro64bit 7-H-Prem-64bit
CPU
i7-5930K 2nd i9-9940x both water blocked VRM's too
2nd ASUS X299 Apex/Intel i9-9940x with Custom water loop/7H-Prem-x64/Corsair 450D case/Ram Trident-z 3600C16 4x8gb / Samsung970Evo plus 500gb SSD/Dual ssd EZ swap evo/PSU EVGA SuperNova 1200w-P2 80+Platinum/GPU Titan Xp /8-ML-140 on push-pull on 2-280GTX rads