All can be done using the <media> tag library, which contains tag and EL functions

The basic tag/functions are:

<media:media>
can be used to embed images, videos, ...

${media:url(medianode)}
can be used to get the url for the image for the UUID

${media:urlres(medianode,'100x100')}
generates the image at the requested resolution, cache it, and return the urls

For more information on media tag please read taglibdocs