I want the users in my space to feel that they are chatting with a person and to be able to ask this chatbot questions. And the chatbot replies with possible answers using available documents or videos from my space (related to the question).
Yes, this is possible. You could take out the words that are not useful for search and more natural text in a tile and use the Jive REST API v3.14 → Search service . Not an easy ask to create and it would help if all the documents and videos had relevant tags to make life easier.