Sue and I have just finished watching the Society of Popular Astronomy talk given by Dr Stephen Feeney of UCL on the problems with the Hubble Constant, i.e. you get different values depending on how it is measured. The talk was simply excellent and well worth finding on YouTube.
Roy
The SPA videos are listed here: https://www.youtube.com/c/popastro/videos
I think the talk you mean is this one: https://youtu.be/TC2Zj8a1W74
It's not yet in the main list, but I guess it will show up soon enough...
...and it's there now. :)