The effect on the first one came out a little too subtle and a bit too busy (I guess I just need a better source pic to work from). Surely not as nice as the one in the video.
I find that if I thin the paints down to the consistency you mention, they don't really make crisp lines at all - even with a good brush. There's just not enough pigment to do more than just shade the area a bit. So it just looks smudgy rather than veiny.
Here's the first attempt using that technique. I'm working on glazing OSL for the cracks so please ignore that work in progress. Used all the colors you recommend, in the consistencies you recommend, using glaze medium instead of water etc. And I'm hardly an inexperienced painter. Can't understand why it looks so bad.
"Heed not the whispers in the gloom, or the rantings of madmen, for they will attempt to beguile you.
Cleave to your training, for heretics speak naught but lies and damnations. Let thy weapons speak in answer."