: You might be referring to how Adobe Creative Cloud software handles MP4 files. For example, older versions like CC 2014 removed the ability to export MP4s directly from After Effects, requiring the use of Adobe Media Encoder .
The MP4 format acts as a digital "container" that can store video, audio, images, and subtitles/captions simultaneously. Cc.mp4
Publish mp4 video project with closed captions from Captivate 2019? : You might be referring to how Adobe
In the context of video files, "CC" refers to Closed Captions , which are text overlays that display spoken dialogue and sound effects. Unlike "open captions," which are burned directly into the video frames, closed captions can be toggled on or off by the viewer. How it Works in MP4 Files "CC" refers to Closed Captions