The videos themselves would be short, rambly and usually pointless.

视频本身会很短，漫无边际，通常毫无意义。

Anyway, yeah, this has been a very long, very rambly video, basically, explaining this concept of, you know, if you wanna do really well on your exams, it's really all about testing yourself.

不管怎样，是的，这是一个非常长，非常漫无边际的视频，基本上，这个视频解释了这个概念，你知道，如果你想在考试中表现出色，你真的要测试自己。