also use this video as a trailer是何功能？ - Facebook

我在臉書上傳影片的時候

偶然看到有一個可以打勾勾的選項：

also use this video as a trailer

請問有人知道這個選項如果打勾了之後

會出現什麼功能嗎？

謝謝

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For Ma continues response like snakes, we initiate action into Executive Yuan,
our demands are consistent with Black Island Young, return service trade,
set regulations to require the KMT Ma Ying-jeou of coming forward to face with
the demands of the people!

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