spatialcomputing.info

As an Artist myself, i am really fascinated by how the art comes into life with the help of AR. So i decided to learn AR from scratch. I did learn Unity+Vuforia and Spark AR but the results were not satisfactory. It doesn't look realistic. I want to achieve results like these:

https://youtu.be/_1uJjT4bRKI

https://drive.google.com/file/d/1GVMVyg152A_76cB0jrIz6vVgYvqUNDdq/view?usp=drivesdk

But the 3D object and the Video Playback doesn't stick to it, like really glued to each other. So how can i achieve this result?

P.S. I am ready to make this from scratch, i don't wanna spend on subscriptions :/