We'll skip the bit about how the title of the video, which is what has excited many, doesn't actually match its contents.
Context aside, it's still not clear to me that there is anything wrong with facilitating witnesses and their testimonies per se.
There is nothing wrong with it. It is something that happens in courts all over the world, all of the time.
In the case of the ICC, the nature of the crimes the court deals with, as well as the circumstances that are usually involved, mean that the OTP investigators cannot, in general, directly get to witnesses. (Think of the PEV and imagine some guy from Europe directly getting to witnesses in Eldoret or somehow finding out, on his own, who was involved in planning meetings.)
It is for that reason many witnesses at the ICC come through "intermediaries", and that has been so right from the beginning.
The following are extracts from a document that explains the above:
Intermediaries perform a range of functions which are necessary for the ICC to do its work effectively. This may include, for example, assisting prosecution or defense investigators in identifying evidentiary leads and helping to contact potential witnesses.
The court several document that are very helpful in such matters: "
Guidelines Governing the Relations between the Court and Intermediaries", "
Code of conduct for intermediaries", and others can be found here:
http://www.icc-cpi.int/en_menus/icc/legal%20texts%20and%20tools/strategies-and-guidelines/Pages/default.aspxIf Moses Kuria did that, for political reasons, that's not a morally good thing. It still remains debatable if it's illegal. Unless it can be shown that the witnesses lied and were told to lie by Kuria.
Provided he did not tell the witnesses to lie or engage in other funny business, he is no different from any other intermediary and has not done anything illegal.