Primary text placement
Due to the headline texts usually looking best and catching the most attention on the top, the primary text placement in social media videos is on the top. To achieve the best composition and flow this means that the logo is placed on the opposite corner at the bottom.
Clear space
Remember that the story format has an extra clear space of about 250 px on the top and at the bottom reserved for automatically generated Meta’s UI-elements.
Secondary text placement
If the headline looks better at the bottom in regards of the visual in use, then the text can be at the bottom and the logo on the top.
If the text is aligned to the bottom of the canvas in 4:5 and 1:1 materials, make sure to have 10% of clear space at the bottom in order to keep the composition airy. Texts aligned straight to the bottom margins can easily look heavy.
To achieve the best composition and flow this means that the logo is placed on the opposite corner on the top.
Visual examples 16:9