Thanks Kippax. I had this going on repeat for a while.
Here is my detailed arm chair commentary.
His right foot lands in the danger area after his delivery stride. That may prove an issue for him. Sometimes it is fine.
Watch where Lillee lands his right foot in this clip by comparison
Dennis Lillee vs Pakistan 1976/77 - YouTube
In addition Lillee like Small approaches the bowling crease from an angle but in the last few Strides Dennis straightens his run up out.
I would also like to see a more aggressive front arm from Small.
Still a good action. And the fact he can swing it is a good sign.