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.
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.