For buyers contracting authority
Pick 72212520 when the deliverable is multimedia software that someone develops for you, not a shrink-wrapped product you license. A contracting authority uses it for an interactive media application, a multimedia authoring or production system, a player driving an exhibition, or content-management software built around audio and video.
The boundary that trips authorities is the off-the-shelf split. If the contract buys a packaged multimedia tool rather than commissioning a build, that is Multimedia software package (48520000), a supplies code, not a development service. Reserve 72212520 for engagements where bespoke software is written, configured or integrated for you.
Two neighbours inside the same parent matter. Communication software development (72212510) is the pick when the software's job is messaging or communication rather than rich-media presentation, and Video conferencing software development (72212515) is the right leaf for conferencing platforms specifically. Where a single contract folds media production into a larger system, set the primary CPV code by the dominant deliverable, not by the whole bundle.