Does the phrase "and this" in this sentence refers to specific objects? Or just general ideas?
The "and this" in this specific case, is referring to the images showing in the video at that point in time. It is not a structured phrase like an idiom or an expression. It is simply a conjunction "and" with a demonstrative. "This" is a demonstrative. We use "this" to point to people and things. Ex: What’s in this box? Ex: This water tastes strange. Though "this" can be used to refer to things or ideas, that's not the case here.