Pixel phones can take "Motion Photos" — it seems like this is basically just an mp4 file stuffed into a jpg somehow (but without sound). The Google Photos app lets you export it as an mp4 or gif file, or pick a specific timestamp to export a still image.
It looks like the Samsung Camera has something similar, but I'm not sure if it's compatible...
It looks like the Samsung Camera has something similar, but I'm not sure if it's compatible...