To move your projects and videos from your old account to the new account, please follow the steps below:
How to export projects from an old account
On your old account, go to 'My projects'.
On the project page, when you find the project you want to migrate, hover above it and then click on the download icon.
After clicking the download icon, click the 'Project file' button which should be right after.
This will automatically download the project file to your computer.
Do this for as many project files as you want to export.
How to import projects to a new account
On the new account, go to 'My projects'.
On the My projects pages, click on 'Import projects' on the left panel.
You will see a pop-up window on your screen to select the file from your Laptop/PC.
Select the already downloaded files from your computer and import them into your new account.
You will now have all the files on the new account.