The supply of cluster munitions to Ukraine will have serious consequences for the country’s civilian population for decades, Cambodian Prime Minister Hun Sen wrote in a tweet on July 9.
Your interpretation of what the Pentagon said does not match the quote. They are very careful: they cannot definitively conclude that the video includes the uses of cluster munitions. That’s not to say that the video doesn’t show cluster munitions or that Russia isn’t using them elsewhere.
The second link does conclude that Russia has used cluster munitions. That is with the benefit of over a year to gather evidence.
Your interpretation of what the Pentagon said does not match the quote. They are very careful: they cannot definitively conclude that the video includes the uses of cluster munitions. That’s not to say that the video doesn’t show cluster munitions or that Russia isn’t using them elsewhere.
The second link does conclude that Russia has used cluster munitions. That is with the benefit of over a year to gather evidence.