In this video on Chord Progressions, I actually only talk about two chords, I and V. I try to give some idea of the connections that have been traditionally formed between these two chords (in tonal music), so we can recognize them, and abstract from them the kinds of relationships that can be formed even just between two simple chords.
Using I and V as examples, we talk much more broadly in the video about some of the main things to consider when you are trying to compose or analyze chord progressions, namely: Voice Motions (Parallel, Similar, Oblique and Contrary), Tendency Tones, Gestures, Cadences, etc.