doubt about raids and stroy progress
Finished instances only reset once per week. You can therefore join someone’s instance and explore it at will (just ask on LFG).
There would likely be a brief summary outside of the raid over the events that transpired within the raid. They did this with the previous raid in Bloodstone Fen. Raid stories are additional content that add onto the existing Living Story but is in no way required to understand the Living Story.
If you want to see the raid stories, players often do post everything on YouTube.
but joining a finished instance wouldn’t really show the story progress, no? besides watching the map I don’t see much use for that.
I didn’t know about the summary, is it an npc or something?
There’s not much story content. Less than in dungeons for instance. But you can talk to the NPC at the beginning of the instance, do the easy side achievements, and (I believe – don’t quote me on that) rewatch the Lazarus cinematics.
I haven’t raided, but I don’t feel I’ve missed out on anything important. Anything that is background lore is covered by the NPC’s in Bloodstone Fen.