I did some some checks on what I could try and see and jab is really frame 4, Dtilt seems still be frame 5, and dash attack seems to be frame 6. Fair looks like it's frame 5. At around 0:55 to 0:56, Nairo does a Dtilt to hop Fair. The starting point is the frame of animation Zelda looks like she's turning around to begin her kick for Fair and right about on the fourth frame when she's in the air. From there, the Inkling gets hit on frame 5. That's 1 frame faster than her Bair and 4 frames faster than her Fair in Smash 4. Bair looks like it's frame 6. At 1:05 to 1:06, Nairo does a D-throw and tries to connect it with Bair. The starting point is a little rough. In the video, it looks like there's two of her and she looks like she's about to turn, from there to when her foot starts to glow gold is on frame 6. I never really understood why Fair was slower in the previous games. Sure, it's "easier" since you don't have to turn around, but it's not like Fair and Bair are easy to sweet-spot and to throw out randomly because the sour-spot and landing lag were bad.
Things I'm not sure about are Side Smash, dash grab, pivot grab, Nayru's Love, and Farore's Wind. Side Smash is frame 13, but more likely 16? At 1:20 to 1:21, Zelda lands and turns around to do a Side Smash. If you go with the moment there's a sparkle, then she hits on frame 13. The safer bet is the frame she begins to turn, indicated by a frame where she shifts her weight and the following frame showing her almost turned around, which is 3 frames before the sparkle. That would mean her Side Smash is frame 16 just like in Smash 4. There's also a moment where Zelda lands at around 1:38 and she does a Side Smash. Right after she lands, she does a Side Smash and I think that's visible by the frame right after her landing being a drastic change in animation. Frame 16 is when the golden magic hands are out.
Dash grab looks like frame 10, but it might be frame 11 which is a safer bet since it's her Smash 4 dash grab startup. Pivot grab is another story. It looks like it's frame 14. Nairo does a pivot grab at around 0:22 to 0:23 and the frame I started with is right when it looks like she turns around. From there to the orange grab effect, is 14 frames. If this is true, then dash and pivot grabs won't share startup like in Smash 4 and will resemble Brawl's where they had different startup. In this case, pivot grabs, well, Zelda's, is her slowest grab. Yeah, I'm going to say wait until the game's released for this one, frame data is confirmed by datamining, and if it feels universal that everyone's pivot grabs are slower.
Nayru's Love is frame 11 or more probable, frame 13? I'm not entirely sure since it's hard to see the animation changes. Around 0:35 to 0:36, Zelda lands and turns white or maybe blue at a certain frame. I used that as the starting point which would make Nayru's Love frame 11. At around 2:03 to 2:04, Nairo does two Nayru's Loves and the second hits. In this part, there's a there's two frames of animation where Zelda goes from idle to beginning a windup for a spin to a windup where she crouches down a little. On the first attempt, Nairo doesn't hit anything, but on the second attempt, he does it again and the same animation windup crouch can be seen and preceded by the beginning to wind up animation.
Farore's Wind's first hit seems to be frame 8 and the second hit was on frame 46 according the Inkling's percentage when it was used at the end of the match. Zelda herself reappears on frame 43. Nairo only landed it out of shield in the two instances it hit, so it's difficult to see on top of it being recorded off-screen. Startup seems to be the same, but I'm not sure on the second hit. My only guess is that Farore's Wind might travel further which could explain it's later hit or the change in knockback necessitated it being slower or else she would have reappeared before her opponent made it up that high.
I'm going to stop there, since it's starting to hurt my eyes because of how the game was recorded and trying to pick out frames of animation changes.
Edit: Remember that this video was recorded off-screen and I'm trying to judge when move animations begin, so I may and will be wrong on these. Also, it's a demo build and subject to change.