The presently claimed invention relates generally to analyzing media
content (e.g., video or audio). One claim recites: randomly accessing
public internet sites to obtain media content therefrom; utilizing a
configured multi-purpose electronic processor, analyzing obtained media
content to derive identifying data from data representing video picture
element or from data representing audio elements; and performing an
action based at least on the identifying data. Of course, other claims
and combinations are presented as well.