Only part I'm iffy on is the Gash Group part. It was a Cushitic speaking society but I don't know if proto-Somalis were involved in it or if we just passed by on our way to Somalia.It's a pretty decent video and its made by this Somali guy. I shared this in another thread.
Time frames are a bit debatable but it covers our early ancestors migration history from Southern Egypt and Eastern Sudan and how we came to populate the horn and our origins in the Northern Somali peninsula.
Only part I'm iffy on is the Gash Group part. It was a Cushitic speaking society but I don't know if proto-Somalis were involved in it or if we just passed by on our way to Somalia.