Adding post_type to the query via pre_get_posts, with infinite scroll

@nimmolo since we solved this, we should leave for posterity that the solution had nothing to do with pre_get_posts. We needed to check the post class selectors for the video posts were the same as for regular posts.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)