Video story types have access to a powered-up related module that will automatically show the last 9 videos in any series. The module is powered by the story type and category systems, so you’ll only be able to automatically pull posts from series (categories) in the Video story type.
Once you’ve selected the Video story type, the series related module will automatically appear. Select a series from the list and the most recent episodes from that series will pop in.
If you’d rather hand curated the related posts, you can toggle to the trust old manual related stories tool by clicking the manual tab.