youtu.be
If you don't want to waste time, here's a summary
The PAX EAST demo had 2 "runs", Gladius and Libra. Libra was much harder than Gladius
Some sources at the event claimed there will be a 2 player mode and the option was greyed out at the demo
Each character has a multi-step questline that involves traveling through time or completely story objectives through events
Every run was very different
There's an online mechanic where players leave bloodstains with some loot for other players in other sessions
The player can use Winding Grace (an item looking like the grace trail in Elden Ring) to self revive. This item is very rare but more common in solo
Each Nightlord leaves a Trace of Night, probably remembrance equivalent
There's a skin of Lady Friede for a character
There's a Codex that collects all lore, and has descriptions similar to item in Souls games