Whenever you are posting something on social media, make sure to post the item on all (for that type of posting) relevant channels.

Here are some examples

Video in portrait mode

if you are publishing a video in portrait format, make sure to publish it on:

Video in landscape mode

if you are publishing a video in landscape format, make sure to publish it on:

Text & Picture

if you are publishing a text and a picture, make sure to publish it on: