I'm going to test & see if I can insert a photo.
1) click on Insert Images
2) This will show available images; at this point you have 2 options a) select image for insertion or b) load more images. to load more image, simple click on "open media manager"
3) from media manager, select existing media files for insertion or load photos, videos, docs or audio.
I've inserted a sample of each document type here. There's even an "autoplay" option on the video and audio insert.