we are new here in search of great pictures for our educational youtube-channel: We want to build parts of the photos in the thumpnails (as backgrounds) and in our facebook-ads (as backgrounds). Secondly we want to use them on our website. And thirdly in our ebooks.
The use is advertising/commercial/illustration, e.g. we want to use pictures of a pendulum to illustrate the pages in our ebooks about physical calculus methods to make it look more professional.
Which is the right license we need to buy and is it 100% safe?
Of course we don't want to name the fotographer or the platform in using the pictures.
We are searching an official statement from adobe for our documentation of licenses.