The lecture Week Two of Embryogenesis: Gastrulation by John McLachlan, PhD is from the course Embryology: Early Stages. It contains the following chapters:
I find the gastrulation and neural tube development hard to visualize and the diagrams used was not very helpful. It would be nice to see how the primitive streak and the neural tube formation is in relation to the full developing implantation.
this really shed more light on my previous knowledge. the audio visual grahics is on point