So this pattern is a little different than the video in terms on how to close each row, as it is more accurate to follow in order to get the perfect triangle.
The pdf pattern will be the same as this so you can recreate the triangle easily
Row 1:Ch4, 4 incomplete dc in the 3rd ch from the hook, join all together to form the bobble, sc in the last ch.
Row 2: ch1, 2sc in the first st, 2sc in the last st.
Row3: Ch1, bobble in the 1st st, SC in the next st, bobble in the next st, sl st in the last st.
Row 4: ch1, 2sc in the 1st st as ch1, 1 sc in every st, 2 sc in the last st.
Row 5: ch 1, bobble in the same st, sc in the next st, bobble in the next st, sc in the next, bobble in the next, sc in the next, sl st in the last st.
Row 6: Repeat row 4
Row 7: Repeat row 5
in every single crochet row, you are going to start with 2 sc and finish the row with 2 sc.
in every bobble st row, you are going to increase the bobbles number by 1, till you get the width you like of your triangle