KICKSTARTER After launch
I have found that it looks like we need to create another video for demo for better understanding on our audience.
It might be a week to publish so I asked them about additional video after launch, they replied:
"You're welcome to add a video post launch. However, videos make projects far more compelling, so we recommend not waiting too long or even waiting till it's up, if possible."
All right, then I will start to create additional.