Search Field within channel

Can you be more specific? Meaning how to add a search within the app, or if you can use the remote search feature to search your app instead of the entire roku ecosystem?

The $1,000,000 question is.... search through your own files. NOT Roku's database.
It is so bizarre that a working code is not shown at all. 

Same question here. It seems like a basic feature like searching inside your own channel is not implemented in the Direct Publisher model. There is something that I'm missing here? That should be implemented by default, allowing to search by titles, tags, authors, etc. inside your channel.