the sound quality of your video makes it extremely difficult to understand your speech. From the beginning your volume is too low to be accepted, but then at 5 minutes into the video your sound becomes highly distorted. I was unable to understand most of what you were saying.
Consider using an external microphone and Audacity for your audio. Keep the microphone very close to your face when recording as to make it louder and to keep the background (cars and street noise) down to a minimum.
As I could not understand what was being said I cannot comment on the content of your video.
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RE: Develop Mobile Apps Using Ionic Framework Part-1