When a frame holds a large block of flat colour, a wall, a sky, a filled panel, drawing it line by line never looked like drawing. The hand went back and forth over the same patch while the parts of the picture that carry the meaning waited their turn. Those blocks are now filled as blocks, and the drawing spends its time on the lines that actually make the picture. The video builds steadily from the first frame to the last, instead of arriving nearly whole part of the way through and then being drawn over.
Not every board has anything to fill. On the ones drawn entirely in line, and there are a good number of them, nothing has changed: the same strokes in the same order as the video you made last week.
Drawing in your own style is a button under the player instead of the last tile in the row, and a storyboard that has nothing to check is not checked.
Every board says how it letters and your video follows it, a picture of your own is read the same way, and an uploaded style stops showing as a broken image.
Minutes are sold in packs, a link to a pack survives signing in, and a new account opens where a video gets made.
Everything that changed, newest first.