When a user uploads a video, they can add tags. For example, a new video about DataSift might include this set of tags:
"DataSift, big data, new feature, Twitter"
Filter for videos tagged with "Lady Gaga":
youtube.tags contains_any "Lady Gaga, ladygaga"
Filter for videos tagged "iPad" or belonging to a category that includes the word "mobile". Not all video sites include tags so you cannot guarantee that they will be present. When you filter against video.tags, you might choose to include a logical OR command:
youtube.tags contains "iPad" or youtube.category contains "mobile"
Target service: YouTube
Always exists: No