He means that the animations in 0.155 consisted of ~70 renders which also counted towards the ~514 in total for both 0.155+0.160.
And for 0.161 there's apparently 140 renders + 400 for animations.
That being said, it still means that L&P has only created the 140 renders, as his supposed animations pro is creating the 400 renders for animations using Blender. But it's funny how L&P is wording it like he did everything himself, no? Almost like he hasn't got any helper at all. Weird!
Anyway, if there's actually 400 extra renders for animations, that I'd consider a decent amount in ~6 weeks. But that would also raise another question... Why in the world did it take so long to create the 70 animation renders for 0.155???
And before people start jumping out of their chairs, animation renders don't take as long to make as they have only slight adjustments to each of them, and Blender is able to do most of it with the press of a button, connecting a starting point and an end point, creating the actual animation on it's own using the assets, lighting, and whatever else you've added, basically (that's simplified).
It also means that a huge amount of time is wasted on animations work and the main problem still persists. No story progression and years to finish a single day.