Hello Kalinka,
Thank you for your interest in Amplify Texture. Unfortunately, the type of texture virtualization we provide is not viable for this specific case.
I recommend using a 3rd party video playback solution like
Universal Video Texture.
https://www.assetstore.unity3d.com/en/#!/content/3755I would suggest using Nuke or After Effects with multiple cropped outputs. By breaking up your video into smaller tiles you should be able to achieve what you require.
Let me know if you need any additional information. I have a background in editing and compositing, I would be happy to help.
All the best,
Ricardo Teixeira