How do I find video id?

Your video id is located in the URL when viewing a video from the edit video page. 

Example:

• Full edit video URL: https://account.gratavid.com/editvideo/3124554e-e97f-4509-913e-c072a2f96bdf
• Video Id: 3124554e-e97f-4509-913e-c072a2f96bdf