Lakers Head Coach -- 'Disappointed Video Got Out' ... Tried to Keep It In-House (VIDEO)

Lakers head coach Byron Scott says he's disappointed D'Angelo Russell's secret video of Nick Young went public ... telling the media he was hoping to keep the matter in-house.

Scott spoke with reporters at a Lakers shootaround moments ago -- Russell was there, Young was not.

Scott was short in his comment about the situation -- but called the matter an "internal issue" ... adding, "We'll deal with it."

Metta World Peace also spoke to the media ... saying the Lakers "love each other" and are "in good spirits."