From video description: I'm going to use blender to create the 3d animation of the box using 150x155 px resolution transparent background and zooming out a little from the box so when rotation the hole box will be shown set the first key to display the front side of the box then on 240 frame rotate in z 360 and same on y and save key Render 250 frames to a png we will get 250 pngs just take 1 of tenth so will will only take 25 pngs from 001.png,010.png and so on
Actually it is a beta but most likely will be final soon https://www.buildbox.com/forum/index.php?threads/buildbox-2-2-8-beta-is-available.8301/