Sesame Street - The Alphabet (evolution of writing)
This is already on YouTube, but this video is in fairly better quality. The letter "Z" is also said differently in this video.
And for those curious as to what the different writing methods are:
A - sand
B - rocks
C - chalk
D - chisel
E - clay
F - nature
G - painting with a stick
H - foggy window
I - ink
J - painting with a paintbrush
K - crayon
L - dry-erase marker
M - standard marker
N - pencil tracing
O - eraser
P - hands
Q - rubber stamp
R - printing press
S - paper machine
T - typewriter
U - grid
V - paper cutout
W, X - computer graphics
Y, Z - computer animation