Video tags are written as a string-ified array instead of a real array

[m-jowa1863]

"tags": "['\u9670\u967d\u5e2b', '\u30ec\u30c3\u30c4\u30b4\u30fc\uff01\u9670\u967d\u5e2b', '\u516c\u5f0f', '\u97f3\u697d', '\u30b2\u30fc\u30e0', '\u3077\u3088\u3077\u3088\u7981\u6b62\u4ee4', '\u91cd\u8981\u30cb\u30b3\u30cb\u30b3\u6587\u5316\u8ca1', '\u65b0\u30fb\u8c6a\u8840\u5bfa\u4e00\u65cf', '\u77e2\u90e8\u91ce\u5f66\u9ebf', '3\u67086\u65e5\u6295\u7a3f\u52d5\u753b', 'sm9']"

decoded:

"tags": "['陰陽師', 'レッツゴー！陰陽師', '公式', '音楽', 'ゲーム', 'ぷよぷよ禁止令', '重要ニコニコ文化財', '新・豪血寺一族', '矢部野彦麿', '3月6日投稿動画', 'sm9']"