Sadly I highly doubt Russia will face war crimes tribunals as it would stir up what the US and China have done. They will probably veto any such attempt at the UN giving some bogus excuse. Only because you decided that the ICC do not apply to you doesn't mean it wasn't a war crime. [1]
[1] https://en.wikipedia.org/wiki/American_Service-Members%27_Pr...
1. Make sure you timestamp and archive this as accurately as possible and ideally with uncompressed audio quality.
2. Please consider delivering a copy of this to Amnesty International and another copy of this to your local Ukrainian Embassy mission.
Ukraine has already started a formal case in the International Court of Justice in the Hague. This material can be vital in corroborating other evidence of war crimes in that court case. The probability of sitting Putin in Den Haag for war crimes is low but the evidence should be gathered nonetheless.
I'm pretty sure I have recordings of war crimes uploaded.