Rotoscoping is an animation technique that trace over a footage, frame by frame.
I use a cat video from YouTube to do my rotoscoping.
To start,open Photoshop and create a new document with Film & video preset then make sure the size is HDTV 1080p. Change your workplace of photoshop to Motion, or open Windows - Timelines.
Right after that, go to Layers and find the Video Layers, select the new blank video layer. Put in the video.
Then draws on a new black layers as shown belows, and press the right arrow key on keyboard to go next frame.
Draw all the frame, and save. go File > Export > Render Video... and render it.
Masking
Masking is an animation that makes text or object appear using effect in AE (Adobe After Effect).
Open AE and make a word using Text tools (my work example: Spash) Then, use Pen tools to highlight the part of words.it will call as Mask 1 after you finish one line. For my, 5 words so there is 5 Mask(Mask1,Mask2, ...etc)
Then use Effect - stroke to make effect like below video
First, draw a shape(in 3D), then pic up to color in light, middle, and dark value. For me the color I choose is Teal, from a light color(you can pick white also) to dark color(not totally black), as shown below.
Color it up by choosing where the light come in contract with the object, and the shadow (dark part), then color it up. Add the light effect (light color) on the edge of the shape(diamond). For my design(as a student also), the light is from the second edge from left, White color is used as the light effect. then my diamond is done!