I thought of a couple more things...
Minthara's comment when Gale dies:
"The wizard has fallen. Typical."

In the voice files I found some lines that I wasn't able to trigger in the game, but it seems like they should trigger during battle if your character is hurt or close to death:

Minthara can say, "Did I give you permission to die?" / "Are you even trying to survive?" / "We should have minions for such tasks." / "You're more feeble than a goblin.."

Astarion can say, "Darling, you're too pretty to die." / "Let's play doctor!" / "You look good all helpless." / "Let's keep you cute!" / "Your savior is here!" / "Don't worry, I'm here." / "Let's not waste any blood."

And from spam-clicking Astarion's portrait: "Strahd wouldn't put up with this sh*t." xD
Banter between Wyll and Astarion:
"I haven't even had a bath since the abduction! I must reek of Illithid slime."

At the circus, the djinni turning you into
a cheese, and then rolling around as a cheese. Also the comments that NPCs make as you roll by them, lol.

Some overzealous fan yelling during Dribbles fight "Dribbles! NO."

One more video:
I don't know if you've ever tried hugging Sceleritas with the hug mod, but I was surprised by how huge he looks! That was funny to me. I thought at first maybe he's just being scaled up to fit somehow through the mod. But when looking at his 3D model next to my Durge, it does look like he's more of a bigger figure that looks small because he's hunched over all the time.
This was also the first time I noticed him catching flies/bugs and eating them x_x

Some Dark Urge spoilers included:

I had to include Sceleritas chewing out Astarion too. xD