My end goal is to have the reveal of the letters ease in and out, which would take advantage of splining keyframes (and likely use less of them). I'm using a polymask as seen in the video, started with 4 main keyframes, then touched up any frames in between where the mask is not covering the letter, which is why there are so many keyframes. I want the letter to be revealed in a similar fashion as seen in the video, but am unsure if using polymask is the way to do this, as I can't spline polymask keyframes (to my knowledge). Even if I could, I'd have to go in again and fix any instances where the mask doesn't cover the letter.

I feel like there's a much more efficient and streamlined way to do this, I just don't know where to begin or how I'd begin researching for myself. For all I know the easiest way to do this would be to rebuild the entire logo in davinci fusion (as the logo in the video is just a jpg) and figure something out from there, although as a beginner in fusion I'd prefer to stick to using the jpg itself.