Those images are both 2000px*1500px, and 600px450px, jpg files; a ratio adapted to the web and presenters.
Please, always keep the original files and work onto cloned files.
You may use these files commercially. You also have simple resell rights (RR), please, read what this license is:
[YES] By purchasing this product you, and only you, are granted resell rights upon the present product; not the clients you sell this product to.
[YES] You can resell this pack made of thirty 1080p looping videos. However, not for less than US $10.
[YES] Commercial license included: you can use all parts of this product personally and commercially on an unlimited number of domains (except stock video sites), in an unlimited number of your clients’ projects as well.
[YES] You cannot claim either authorship or ownership of the present product.
[NO] You cannot modify, alter the content of this product.
[NO] You cannot give away this pack as a bonus when people buy other products that you sell.
[NO] You cannot distribute any part, let alone all of this pack, outside of any selling process, in order to just build your list.
[NO] You cannot either resell or offer for free any of these videos on stock video sites, video libraries…
Credits are much appreciated :)