To effectively collaborate in screenwriting, one must be able to co-write with, work together alongside producers, directors or other vested third parties. Open line communication must be put up along with respectful culture if one is to work effectively in collaboration. You should start by sharing your vision about the script and actively listening to what others have to say concerning it and taking into account that every collaborator has different perspectives and expertise to bring to bear.
You must always be willing to accept recommendations for changes even if they conflict with your personal perceptions of how it should look in order to maintain the creativity aspect of this piece. You should collaborate closely through the development process reflecting from when you first think of it to the final corrections thus ensuring everybody is moving in the same direction as far as the project’s mission and objectives are concerned.
Moreover, you need to be ready to change as well as make sacrifices whenever this is needed thereby finding innovative ways of dealing with difficulties and satisfying the requirements of producing something. If directors, producers and various other stakeholders work together, they can combine the creative effort of each to come up with one script that will please the audience and meet the demanded artistic vision.
Jamuura’s channel has an interesting video by Kabir Khan where he gives “Advice To Writers Pitching Their Story At Frame Your Idea”