This is Gerite the Dinosaur from 1914 by Windosr McCay.
Much of today's animation is done in as CG thanks to the technological advances from companies like Pixar. And while that is the new norm, there is still a number of animators who work in the traditional, 2D hand drawn style.
The first full length animated film in history was Walt Disney's Snow White and the Seven Dwarfs in 1937. Disney estimated he could do the film on a budget of $250,000... ten times the budget of the animated shorts he had been doing up to that point! Though subject to repeated attempt to be talked out of it, he charged ahead. The final budget for the film ballooning up to over $1,488,400. He even had to mortgage his house to finish financing it. The film was incredibility well received and won an honorary Academy Award that year. Since then, animated films have become much more cost effective and easier to produce, which has paved the way for independent artists and animators to use the medium to create more and more artist productions without having to worry about any technical limitations. People like John K., Peter Chung, and countless others, have taken great strides in furthing the artistic level in animation. As a result, we end up with mind blowing animated sequences like this one posted below by artist Anthony Schepperd. Bearing in mind that in every second of film, there is 24 individual frames. So for this 5 minute + animation, Schepperd had to illustrate and color at least 7680 images. Thats nuts.
Please to enjoy "The Music Scene"! Music by Blockhead, animation by Anthony Schepperd.
