Still images namespace:

Example: Unicorn_concept_v01.psd

Moving pictures namespace:

Example: Unicorn_sh0010_20210101_ldv_v01.exr

Still images WIP as .jpg file or .png file.
Video WIP as .mp4 files

Still images deliverables as .psd files or .exr files.
Video deliverables as .exr files

3D scene deliverables as .c4d or .mb or .obj

Work in 16-bit depth.