My capture pattern doesn't look seamless in photoshop

Hi There,

I'm using photoshop 2020 and I imported an image to my photoshop and thried to create a pattern but I always see some triangles in the pattern which make the pattern doesn't look seamless.Please see the screenshot at the following link also,I've uploaded a video capture and you will understand what I mean.

Thanks

https://cloudup.com/cLXpC3L2ySI

https://cloudup.com/c07JziVrkYT