I only know of a few similar projects for management and proofreading. One is more oriented towards animating web interfaces, and the other is the one you need. Here is the online proofing tool https://krock.io/online-proofing-for-creative-teams/ you should use. Communicating with your client and sharing your project with him is easy. He can enter and leave a comment everywhere, even in the video at particular seconds. For creative teams, this is necessary software.
online proofing tool
