Great!
I use the same asksteem queries as on dtube website. They are still there despite the asksteem API returning an error, so you can see what they are exactly. But to summarise:

- recent dtube posts for an author
- related content, probably dtube posts that are using the same tag as the current post. The way you make sure it’s a dtube content that has a video is by checking that json_metadata contains the ‘video’ property
- searching posts by keywords inside title and body
- searching posts by tag
- searching posts by author
- combine the three above with a filter that look for the ‘video’ property in the json_metadata

I believe asksteem is using Solr or Elastic search and you can enter the lucene query in the URL query string

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