You can say that you are going to recap when you want to draw people's attention to the fact that you are going to repeat the main points of an explanation, as a summary of it. 概括
verb [vt. 及物动词]扼要重述,摘要说明;翻新胎面
To recap briefly, the agreement was rejected 10 days ago. 简短概括就是,这项协议10天前被否决了。
noun [抽象名词]扼要的重述,概述;翻新的轮胎
Each report starts with a recap of how we did versus our projections. 每一份报道都以一个概要开头,讲述和预期相比我们的表现如何。