Drawing or adding modifications to a photo or video

it would be nice to have a feature like on snapchat or instagram that lets you drag and drop an emjoi onto the top of a photo or video. or to use your finger or mouse to paint or draw over a photo or video.

i wonder if this would have to be a feature that is part of an input or part of the features in a drag/drop group.

rather than a pic, or video, what about drag and dropping an emoji, or drawing over a text that was typed?