Just a quick correction, the ICJ (where this is taking place) is the UN Judicial body. The ICC, established by the Rome Statute, is a different thing. If you’re a UN member, the ICJ has jurisdiction.
The ICC is also launching a war crimes probe, but as you noted, Israel and the US aren’t signatories so that might not amount to much.
Are you still having issues with the download feature? It was definitely a disaster at first, but it’s gotten way more reliable and responsive over the past few months it seems.
Edit: I ask because I’ve seen quite a few “fixes” that people have advertised that seemed to work for a bit, and could dig them up for you if you needed.
I’ve had the same issue sometimes, usually switching the video player to “Use Old Video Player” (or vice versa) solves it. Sometimes the HDR tone mapping is a bit off then, but as another commenter recommended, Infuse works well for that.