Question I need some hints resolving strange distortion

Hey guys!
Just for fun and practice I want to translate this Golden Cards shader to Shader graph. The main distortion part went well. Now I try to get one effect layer done, but I get these strange distortions (see image), which absolutely do not look like in the video. Please check the attached image. I would be happy, if someon has a hint on how to fix these.

Cheers

Edit: Maybe I just dont understand exactly how the uv motion texture works. Does someone has a tutorial for this. The video explains it, but a second source might be useful.

 

Someone has a clue?