I learned this recipe from a French baker, and now it's my favorite!

I learned this recipe from a French baker, and now it's my favorite!
👉ATTENTION !! Turn on subtitles yourself.
They are translated by Google and available in each language.
Ingredients:
300ml (1.25 cup) warm water
1 Tbsp (9g) dry yeast
2 eggs
1cup (120g) cooking oil
680-700g all-purpose flour
1 tsp (5g) salt

1 Tbsp butter
1 Tbsp sugar
1 tsp vanilla sugar
4 Tbsp flour

1 egg yolk