«…Блеск кристалла и тонкость граней…». Русское стекло XVIII – начала ХХ века с резьбой и гравировкой

Picked video by video from The State Hermitage Museum (mixed channel): title plainly names a teaching subject. Channel transcript sample: Two of the three samples are promotional/ceremonial content (event announcement and anniversary congratulations) while only the director's tour qualifies as genuine teaching, confirming the channel requires video-by-video selection.