Re: is there video app for sending it ?
Welcome to Android Central! You could try various 3rd party messaging apps like WhatsApp, but many times the recipient has to be using the same app. If you just want to send a message via the typical SMS app, then your best bet is to upload the video to a cloud service like YouTube, DropBox, or your Google+ Photos, and privately share the link with the recipient. That's essentially what happens if you send a video using Hangouts, and it's the same general principle for Apple's iMessage.