At level 1, I would think so. You don't have much attack speed to work with so it will look somewhat slower than you'd expect.
Around level 11 or so, using the same technique, you should be able to see a significant difference in how fast that attack animation is cancelled between Qs.
Regarding your video, from the beginning up to the 6 to 7 second mark, you're doing great. Afterwards it got a bit shaky and you let the attack animations go through.
Again, at early levels it's a bit tricky since you don't have much attack speed to work with, which is why some Rivens may opt in for 'Legend: Alacrity' in the Precision tree to get a smoother attack animation cancel earlier.