This is "The Blackened Mantle", a fan edit of the three Star Wars prequels. All voices are taken from the Japanese dub, which accurately represents characters and transmits emphasis. The dub is merely a placeholder and what's on the subtitles has no relation to it: all the dialogue is new and overall better, with a more personal focus: some lines in duels are now about characters rather than tactical conditions. All three movies are sewn together in less than three hours of screentime: Revenge of the Sith is the main line and proceeds in a linear fashion interspersed with flashbacks to the previous two installments. The flashbacks are broadly, but not always, linear, and only some parts of the first two films are shown; each flashback fits within what happens before or after it, sometimes very well.
Some things are omitted for brevity, and others, for real change. A few details are changed for tension, the lore is a bit different, one scene has a different order and a side character gets a plot twist while the main characters get some important differences from the original to increase emotional pressure. Cut footage is used. The overall plot is the same, with a magnifying glass on Anakin Skywalker's tragedy.
It works very well and leads up to a finale that's visually the same (and the visuals are heroic) but emotionally stronger than the original. Not that the original was bad. I think at least Poland will like this.