[video]

[forbiddenfriendship]

[the video feed turns on, and a giant, curious yellow eye stares back, accompanied by a deep, rumbling noise that sounded a bit like a cat's purr. Off in the distance comes a young man's voice talking in Norse - although thanks to the communicator's translation, there's an easy English text version popping up]

Toothless, what are you doing with that…[there's a crash, as the voice has apparently just dropped something]...oh gods, it's a magic book.

[the giant eye twists away, as Toothless lifts his head up to look inquisitively off at something to the side - the source of the voice, presumably. The angle is strange, and all you can see is part of his head, but it's clear enough that Toothless is covered in black scales, and big.]

Okay, okay…Toothless, just come over here, okay buddy? [Toothless rumbles softly, but takes a step away from the book, and out of view.] That's it, come on…let's get away from the magic, probably cursed book…oh gods, why me…

Comments

[akito]

Messages can be sent via writing (text), voice, or video.

[forbiddenfriendship]

What's a video?

[akito]

A video is a collection of sequential images
Combined together to make a moving image.

[forbiddenfriendship]

You mean like a lot of drawings? But how does that make it move? Or look so real?

[akito]

The reason we can see colour is because when light hits an object the object absorbs some of the light and reflects the rest away in what our eyes perceive as colour!

To record video
You have a device with a lens on it
The lens lets light into the device and focuses it on something that reacts to the light in a way that copies the colours it sees

Or something like that, at least!!

Even drawings can appear like they're moving if they are drawn in sequence
Like if you draw someone running in one picture
In the next you move their arms and legs a bit
And keep repeating the process!
Then when you look at the sequential images in rapid succession
It looks like they're moving!

I don't know how more advanced recording devices work, but the basic principle is just capturing an image of reality and 'drawing' it on something using light.