Yeah, it's energy / elemental stuff. It nullifies ninjutsu so it should extend to other stuff like sealing, barriers, and all that but it was never shown so I dunno how it would work.
Jesus, the weird voice in the second video made me afraid. Well, it seems to be a widespread attack, but Naruto is a single target, so defending against the arrows that converge on him should be easy for him. It'll destroy a lot of clones for sure, but those guys also have methods of defending themselves since they can use all of Naruto's attacks. Besides, his AoE is more than that so he or his clones can take care of it + the TSBs that can neutralize any of the arrows specifically aimed at him.
As for Naruto's offense, I was going to ask about what Madoka has for Naruto trying to overwhelm with attack spam, but it seems like their spam cancel each other's out. But clone spam could work if there's a slight lag in the activation of White Light of Salvation. I mean, if it's not passive or can't continuously be kept activated without it stopping. If she has to activate it, I suppose Naruto's clones can get in close by transforming into inconspicuous stuff, but if it's passive, they get purified once they transform back. Err, actually if they transform into rubble and wait until Madoka flies past them, they can successfully attack her. Normal attacks wouldn't kill her because of her Type 2 Immortality but knockout or incapacitation can work if the attacks do enough damage [except she's like Homulilly?] and the TSBs would work providing Naruto passes some of his to them beforehand.
There's still the option of him launching a frontal attack with his TSBs, but that probably depends on what "near" means for White Light of Salvation, so I'm going to wait to see how far it extends.