Style transfer has been an area of active research since the original proposal in 2015. Many new ideas have been proposed to accelerate the computation and extend the style transfer to video analysis. Among many, two results are worth mentioning

The article, fast style transfer by Logan Engstrom https://github.com/lengstrom/fast-style-transfer/, introduced a very fast implementation that works out of the box also with videos.

The website, https://deepart.io/, allows you to play with your own images and repaint your picture in the style of your favorite artist. An android app, an iPhone app, and a web app are also available.