Videos can be uploaded in three ways:
From your dashboard, navigate into a specific project then Drag and drop your video or multiple videos into the main area of the screen (see below). The files will be queued in the upload manager (upper-right) and start uploading automatically.
From your dashboard, navigate into a specific project then click "Upload" at the top (see below). You can then choose to upload files from your device or directly from your Google Drive or Dropbox account.
Open the Upload Manager by clicking the up arrow icon in the upper-right corner, then click the up arrow icon in the top-left of the manager (see below).
For more detailed information please watch the video above.