Hello, this is Jan. Welcome to Scribbly Videos. 
Did you know that video is one of the best ways to create interest and draw people to your posts? We apparently have the attention span of a goldfish and our interest in what we are looking at fades after about 6 seconds, unless we see something unique to grab our attention.
Watching the hand write and draw is exactly that!
The video engages them in your message and creates enough interest to get the viewer to the very end where your important contact information is, whilst revealing why they need you, your products or your services. That's a winning recipe for social media engagement.  Have a look at the videos on the examples page