No doubt in the creation of a marketable clip, color correction is the most delicate and most important step. However, many video makers wonder whether to sell a clip more easily you need to include audio or not.
Working on audio is an extra step in post-production and involves specific skills as well as, if you record audio directly while filming, sufficiently sophisticated equipment.
After cleaning the sound from any noise that may have been created during recording, the audio should also be properly cut and synchronized with the clip.
Is it worth it? If we take into account the likely sellers of the stock clips, we can see that in most cases they are either freelancers or agencies who will also work on the clip and are unlikely to keep it as it is. So, it is very likely that they, in turn, will choose music or sound effects to add.
For most possible buyers, audio in a clip may be more intrusive than useful and may be discarded for this very reason.