This could certainly be done in AE. Use the pen tool to draw a shape layer stroke back and forth over your footage (basically, in whatever order you want your graphic to appear), then add the Trim Paths layer effect to it and keyframe the start or end to draw over your footage. Put this layer over your graphic and set it to Alpha Matte or Alpha Matte Inverted depending on if you want it to animate on or off.
The liquid look is a similar concept. You could duplicate your stroke shape layer, make it an adjustment layer, then add a warp or distortion effect.