If you are looking to give feedback to post-production, there are a variety of methods you can use. One effective option is to use Loom, a screen recording tool that allows you to record and share your feedback in a clear and concise manner. Another option is to provide written feedback, either in an email or in a shared document. This can be a good choice if you need to provide more detailed feedback or if you are working with a team spread out across different locations. Whichever method you choose, it's important to be clear, specific, and constructive in your feedback so that it can be effectively implemented by the post-production team.
Comments with timecodes
Still, you want to be able to eliminate the back-and-forth between the producer and postproduction. Using a webpage like this one could also work as well if you can get the team involved.