Waves? Particles? Understanding Quantum Mechanics with Jim Al-Khalili

I recently pointed out that understanding has its limits:  We all USE quantum mechanics, for example, (like, now) but we do not really understand it.  

I understand how, for example, my Hex beam produces 17 meter waves.  But I do not understand how 17 meter particles are produced.  

In the above video, quantum physicist Jim Al-Khalili explores this gap in understanding.  He explains it all very well (within limits, of course).  Particularly good is his presentation on "The Ultraviolet Catastrophe." 

Check it out.  In follow-on videos Jim looks at various theories that have cropped up to explain the gap in understanding.  Here is his YouTube channel: https://www.youtube.com/@UnbaffledScience