Ajahn Brahm's videos on the Buddhist Society of Western Australia (BSWA) Youtube channel. From what I remember of them (I watched them mostly around 2010 time frame): his talks aren't religious, rarely touch on spirituality, and are more very logically laid out conversations and anecdotes about being happier by embracing things like unconditional love and kindness. A few months of listening to his videos really made a massive difference in how I view the world, and a big difference in my own happiness because I am better at accepting people for all their flaws and difficulties and poor actions.

https://www.youtube.com/watch?v=jniaUr_7438 is the one I share most often - Dealing with difficult people