Here is an example. Ironically it is without PD but for loading images with the OF filesystem (but I tested with PD). Audio and video are loaded as urls and played with java script:
It is also possible to route the audio from the audio/video player to ofxPd or load a local PD patch.

Here is an example with soundfiler:
One disadvantage in comparison to is, that it only loads .wav and .aiff while the other player also accepts mp3 and other formats (because its decoded to pcm in java script and send directly into a Pure Data array).