What the hell is a bundle of recap movies doing in the top 150 of MAL (number 144 as we speak)? I'm willing to recognize that Gintama is a great anime, and the movies did cover the most important arcs of each one of the two first seasons but still. Is it really worth watching those arcs all over again, but harder to find and in lower quality? Hell no.
What is there to say about it? The arcs are great, although the Shinsengumi rebellion one has aged poorly regarding Gintama's increase in quality.
Honestly, a waste of time. The only reason it's even this high is because the arcs themselves are good. As I said, the best of their respective seasons, at least in terms of how the world progresses if nothing else.