I'm not sure why this episode streamed, but it seems to be mostly pointless. It is literally a recap of what has happened between the last few episodes of Season 1, and all of what's happened in Season 2. It may be the case that some have forgotten Season 1, but it's entirely pointless for it to recap what's happened in Season 2 considering the Season hasn't been out enough to forget major details.
All in all pointless and kind of frustrating considering we have to wait an additional week (at the time of writing) before any more plot progression. If you've forgotten what's happened in the past few episodes, and or Season 1, go ahead and watch it. Otherwise, wait
