Here's how to deal with this issue. WeVideo gives you the option to upload files from your computer, as well. On a Chromebook, if you choose this option, you will see your folders (both Drive and Downloads) and you can upload from there. On other devices, you will see all local folders, so you will first want to download the files from Google Drive. You can then upload from whatever folder you chose.
So, the whole process is:
- Click the second tab to get to your WeVideo media
- Click the green upload icon
- Click BROWSE TO SELECT
- Find the file(s) and upload