First, this is a 2/3 + 1/3 column layout and a 1/1 column underneath. This can be done manually or if you have a page builder like visual composer, or a page builder in your theme.
What you need to do is setup a new gallery and in the Navigation Style, set it to none, because we will have no navigation inside the gallery but it will be outside. That said, we need to link to the outside gallery. Scroll down to Outer Parts and set Second Con, Outer Navigation and Outer Navigation, Show Video Author to On.
Then in the first 2/3 container you need to enter
In the right 1/3 container enter
In the 1/1 container enter
That would be all. Of course, note that these containers are separted from each other. can be inserted anywhere in your page.
Also, if you don’t have Visual Composer or a page building plugin, this is a code:
<div style=”float:left; width: 66%;”></div><div style=”float:left; width: 33%;”></div><div style=”clear:both;”></div><div>