"Er-" Right, Draco wouldn't know. He thought how to explain it, then finally just came up with, "moving pictures? We can capture a video on our-- oh!" He tugged out his phone and opened up the camera, flipping it around to record them both and leaned in close, hitting record to record them both. "So right now, it's capturing the video on my phone--" He flipped a peace-sign before he hit stop, then stopped walking so he could bring up the video and played it again.

"Ta-da," as he gave himself a peace-sign, "video."