Not part of the core code.. Images only.. There is a BETA version in the authors Github repo which is in response to this issue:
https://github.com/daniel-hopkins/zen-colorbox/issues/9.
Be advised that the code is UNTESTED and INCOMPLETE, and there is NO SUPPORT for it here really. In order to have continuity across a shop using this module, the plan was to address ALL the popups in the list. 3 remain outstanding, and the author has been busy and has not been able to do any further work on this feature. ANYONE who wants this feature fully functioning to fork his repo and pick up where he left off on this feature would be a hero! SHARE IT with the community!:smile:
I will be submitting an update to Zen Colorbox soon. The updated code is in my Zen Colorbox Github fork of the Zen Colorbox repo.. I submitted a pull request with my modifications to the master repo, but because the author has been busy he has not yet approved and incorporated my changes into his master repo.. So just know that IF you decide to install this version with this code and you also want the LATEST and greatest version, there will be discrepancies between my fork and the author's repo so you will have to merge them together..