Hi @MichelleLi1 - It sounds to me like Requests might be a better solution than projects. Reason being, Requests is a more definable process in Workfront. If you have a project and have them add tasks, its not as straightforward how to enter that information and there is room for error - you would need some intensive training guides to show them how to add a task, click the task, find task details to fill out information, go to documents to upload files, assign the task, etc. Requests is more straightforward user experience in that they fill it out, add the video or link, submit, and it's ready for you to work on.
It might help make it less tedious if you have one request for the video, upload all sizes at the same time, and have form fields to help you collect relevant information.
Just some food for thought though! Good luck with the process change