It seems that your hair is not attached to the head. Read carefully each step of the tutorial and do exactly the same. I'm sure you missed something (select V4 vertice with the already defined preset, generate the springs,...). I made also some mistake the first time I tried VWD for hair because the process is not exactly the same as clothes. For my first tests I didn't change any parameter value and so far my results are good.

Not sure you need an animation for hair like you are doing still render like me. What I do is conform the hair on V4 posed to put the hair in correct position and then do a static simulation. A much more simple workflow.