An aspect of the disclosure related to methods and systems configured to detect that an item of streaming primary video content associated with a channel of scheduled streaming content is designated to be streamed to a device. Ancillary content is identified. Alternative versions of respective sections of the ancillary content are identified. Metadata corresponding to the alternative versions of ancillary content, metadata corresponding to the item of primary video content, and/or metadata corresponding to the channel are used in selecting a first section from among the alternative versions of a given section. The ancillary content, including the selected first section from among the alternative versions is streamed to the device immediately before, during, or immediately after the item of streaming video content. The alternative versions may be transcoded to generate multiple encoded iterations of respective alternative versions and the encoded versions are stored in a tree data structure.