Problems with latte art: too thick to draw

From the video, I agree with the comment that you haven't made enough foam. This is probably mostly due to the small vessel you have. The proper steaming pitcher should hold about twice as much milk and foam as you'll actually use. This gives you the space to spin the milk and create lots of microfoam.

After you have an appropriate pitcher, follow these steps:

1. Fill the pitcher to about 1/4 capacity. Submerge the steam wand into the milk and turn on the steam.

2. Stretch the milk by drawing down the pitcher in small movements to create some foam. It should sound like the hissing of a cat or tearing paper. Stop making foam when the milk has risen to about 1/3 of the pitcher capacity.

3. Spin the milk by holding the steam wand against the side of the pitcher. This should block off one of the jets so the other 2 or 3 jets are all directed towards the center of the pitcher. Try different angles until you find the right spot where the milk really spins in a fast vortex. The spinning will chop up the bubbles smaller and smaller.

Keep spinning until the milk has come up to temperature. You can use a thermometer or touch your hand against the side of the pitcher; when it's too hot to touch, then it's ready.

4. Smack and Swirl the pitcher. Tapping the pitcher down on the table will pop any large bubbles on the surface. Swirling will loosen up the foam and allow bubbles in the middle to rise to the surface. After a few repetitions you should have a smooth glassy surface on the milk.

Then you're ready to pour. For this I'll defer to the master