Snappity Dapity is a phrase used to express your excitement in someone'e elses behaviour. It is an extension of the phrase "oh, snap!". It may be used to emphasize someone else getting burned, a congratulations, a way of telling a person you are impressed with something they said.
John is watching a t.v. show and the main character makes a move on an attractive woman. John smoothly says, "snappity dappity" to express his excitement for the main character.
Using Snapchat or a similar social video streaming platform to convey a thoughtful, random or informational topic in the form of a speech. The subject matter may vary but the speaker is only cognizant of an audience if the social media platform provides these analytics.
Have you seen DJ Khaled's snapliloquy yet? He gave an inspiring speech. It's on Twitter now, I think.