I found these excellent videos posted on Youtube.

(please give it some time to load, or Refresh the page if it does not load.)

Lesson 1

Lesson 2

Lesson 3

Lesson 4

Lesson5

Lesson6

Lesson 7

Lesson 8

Lesson 9

Lesson 10

Lesson 11

Lesson 12

Lesson 13

Lesson 14

Lesson 15

Lesson 16 – End

The following 2 videos are about saying each letter correctly. It might be hard to understand, but this is good for grade 3 and above.

Part1

Part2

I also found the following 2 videos, but you should understand the concepts in the videos above first

Lesson 1

lesson 2