Similar layout and footage between some manufacturer websites

[Kenita]

Does someone know why there are so many similarities between the official website of some brands. Impressive is the position and appearence of the vials
In example, Dragon Pharma, Axiolab, British Dragon ...
i can also add that they show the same style in responding to requests through their form

But the most impressive are the images of their vials )

 

[Kenita]

I wrote footage but I meant photographic material, sorry