Foreign Affairs

Quite educational on how they built the sarcophagus right after the 1986 disaster (something like in 200 days IIRC, its somewhere in the video) and its inadequacies, and so they built the big "NSC" (New Safe Confinement - the big dome over it all that we see today, and its weak points, even before the big hole blown all the way through. (I bold it because I use the "NSC" abbreviation throughout).

0:59: picture of the hole.

2:14: more on the hole. Occurred Feb 14 of this year, fire spread extensively, took 17 days of continuous water spraying to put it out.

4:09: extent of damage - about 5% of the dome's surface area (progree guess), almost all at the top (they show a picture so you can venture your own guess). Later on, they say there are additionally 300 holes created by fire crews.

Then how initially after the 1986 disaster, they built a "sarcophagus" to contain the 95% of destroyed reactor fuel that remained, and how it was problematical. So they built the big "NSC" over the sarcophagus. At 11:15 -- the steel rod structures holding up the NSC.

12:21 - the drone broke the air-tightness and why that's a problem (corrosion).

15:50 -The invasion and occupation of Chernobyl by Russians for a month - Russian soldiers even dug and lived in the trenches in the contaminated exclusion zone.

17:08 - Loss of most of the human capital / knowledge base. Also a lot of destruction of transportation infrastructure to the plant making efforts to deal with the problems much more difficult, despite Trump ending the war many months ago even before taking office because Putin respects him (OK that's not in the video),

18:55-if the sarcophagus (which is in a precarious position) collapses it would be disastrous in the situation with the NSC having holes in it. In the short run, they'll patch the holes..

18:54 Essentially they don't know what to do about repairing the NSC in the long-run, they are still exploring long-term solutions, but likely the result will not have the 100-year supposed lifetime of the original NSC.

It ends on an optimistic note about how the international community contributed so much money and expertise to the building of the original NSC and their high level of concern now.