Draw over a video on Android in real time

How to draw over a video on Android on pause and on recording ?

1. 1. Upload    your video (MP4,  MKV or Webm format)
   2. Choose a color 
   3. Tap on  to start handwriting over the video.
   4. Tap on to change the brush size
   5. Start to Record again your video
   6. Slide your finger on mobile screen to draw in real time during the playing / recording of your video. As the video is recording, each drew line will appear as soon as you release your finger. If you use a low-end mobile make sure to move your finger slowly for a smooth drawing.
   7. To clear the drawing click on 
   8. Pause and download your video when it’s finish.