Create a new folder:
From the homepage in VidGrid, click the "+" icon on the top left of the page.
Choose "New Folder"
Title your folder > Save
Your new folder will show up in the left hand sidebar, as well as on the top of My Grid.
Create a new subfolder:
Follow the same steps for creating a new folder, then click and drag that folder on top of the parent folder that you would like the new folder to be nested under.
A new subfolder can also be created by first selecting the parent folder (double click) and then procede to follow the steps for creating a new folder. The folder will automatically be nested in whatever folder you are currently in.