Hi, as described in this article about uploading to Stock Footage category: https://help.author.envato.com/hc/en-us/articles/360013142072-VideoHive-Upload-Permissions-and-Portfolio-Review
Stock Footage and Motion Graphics Upload Restrictions
The ability to upload items in the stock footage and motion graphics categories on VideoHive is restricted to approved authors only. Permission to upload is at the discretion of Envato.
Portfolio Review Required
To request access to upload stock footage and motion graphics items, you must submit a portfolio. This portfolio should show your ability to meet the technical, quality, and integrity requirements for these item types and also be of subjects that are likely to be relevant to potential customers. Your past account history may also be taken into consideration.
To submit a portfolio, please fill in this form.
Once you have submitted a portfolio, our team will review the items and make a decision. You will be emailed with the results of the portfolio review and if approved, the ability to upload will be assigned to your author account.
You can only submit one portfolio for review in any six month period for each category. If you are not successful with your portfolio review you must wait six months before you can submit a new portfolio for review.