Hello Jess,
Thank you. After reading your response, I was wondering what I was doing wrong because I did pretty much the same except instead of filter.categoriesIdsMatchOr=15, I used filter.categoriesMatchOr= , but I wasn't getting the results I was expecting.
You're last section triggered me to look at the categories/id and when I did a media.listAction and did see the media I was looking for.
After hitting the "Send Reguest" button, it was on Visual and I guess there is a limit of 5 content Items if I leave index and pager = null. That's what led me to believe I was doing something wrong. When I switch to RAW, the data came pouring down. Sweet!
Thank you,
-romeo