We have a lot of astronomy lectures - worth using search if there is something specific you're looking for. Lectures before 2014/15 - such as Carolin Crawford and John D Barrow's series, tend not to have such great video quality - our alternatives are audio and transcripts.
General
Why Society Needs Astronomy and Cosmology Roberto Trotta
Cosmic Vision: Attentive Eyes Katherine Blundell (on naked-eye astronomy)
Cosmic Vision: Witnessing Fireworks Katherine Blundell (on the use of astronomical discoveries in past centuries today)
Cosmic Vision: Watching The Radio Katherine Blundell (on Radio Astronomy)
Cosmic Vision: Unravelling Rainbows Katherine Blundell (on the use of light to explore distant universes; 2021)
Cosmic Vision: Fast and Furious Katherine Blundell (on Cosmic Rays, 2021)
Cosmic Vision: Spacequakes Katherine Blundell (on when Black Holes merge, 2021)
Understanding the Universe with AI Roberto Trotta
Space Sounds: The Music of the Cosmos Roberto Trotta (2021)
In the Beginning Joe Silk (the early Universe, the Big Bang etc)
Dark Matters Joe Silk
Elementary Particles and their Interactions Joe Silk
Ultra-Compact Objects: Astronomy with Gravitational Waves Joe Silk
The High-Energy Universe Joe Silk
Lecture series on Astronomy by Blundell, Trotta, Crawford and John D Barrow
Cosmic Concepts series Katherine Blundell
The Nature of Reality series Roberto Trotta
Astronomy Lectures by Carolin Crawford (from a decade ago - video quality not as good)
Astronomy Lectures by John D Barrow (from a decade ago - video quality not as good).
Issues
Existential Risks in the Solar System Joe Silk
How Special is Our Universe? Joe Silk
Are We Alone in the Universe? Joe Silk
How Common is Life in the Universe? Joe Silk
Neutrino: The Particle That Shouldn't Exist Roberto Trotta (2021)
The Moon
50 years of Lunar Exploration Joe Silk
Great Astronomers/ physicists
Caroline Herschel Discoverer of Comets Sheila Kanani
What has Einstein ever done for you? Roberto Trotta