doodlevideo is a video effect app helps you easily add your doodle into video.
Using doodlevideo is easy, first create your doodle by taking picture for your hand-writing doodle (or caption) , or import it from camera roll. celulu will convert them into doodle file. Then you can select video you want to add doodle, setting its position and scale, celulu will start compositing video.
You can use doodlevideo add watermark to your video, or add some hand-writing caption to your video. Generated video is also good for video editing, you can generate up to 1080p video for video editing.
Demonstration of using celulu
https://www.youtube.com/watch?v=jDMLRcWaVRM