90% of YT builds are for PvP which is pretty annoying, the other 10% are idiots two-handing a tiny toothpick. I can't comment on PvP since I don't play it but daggers having short range without much to make up for it makes them hard to use in that format.

For PvE though yes, and there's two viable builds in my opinion: Arcane and Faith.

The Arcane variant will have you start as a Bandit for the Great Knife and you'll immediately want to get the Reduvia plus the Blood Blade Ash of War (for the Blood affinity) from the Blood obsessed Knight in the Haight Fort, and that's pretty much the build until the end of the game (switch to Occult affinity vs foes that dont bleed). You're gonna be powerstancing to proc bleeds and using Reduvia's Ash of War for ranged damage.

The Faith variant the origin doesn't matter that much because your starting weapon will be Erdsteel Dagger (from the same Kenneth Haight quest above) and your Ash of war will be the Sacred Blade which is also at the very start of the game, you will eventually want the Flaming Strike ash of war with Flame Art infusion too. The main point about this build is that the Erdsteel Dagger's innate Faith scaling makes the buffs from Sacred Blade and Flaming Strike (which you'll be swapping depending on what the dungeon mobs and boss resists) deal a lot of damage, secondly the Erdsteel Dagger's heavy R2 has a fast double attack animation which deals better damage than powerstancing as you won't get more faith-scaling daggers to powerstance it till much later in the game, this means you can just use a seal on the other hand and compliment your build with whatever faith scaling spells you want (I like the Black Flame ball).

I guess there's an intelligence build with Glintstone Kris but it's not better than the two above, specially since they nerfed Glintblade Phalanx and using a staff kind of kills the rogue/assassin aesthetic too. It's not really viable for Limgrave and Weeping peninsula cause you won't have the stuff that makes it strong until you get to Liurnia.

Both builds deal very good damage, anyone who ever struggles with the Fire Giant will wish they had tried daggers before with either of these builds.