PostEaseResizing is not the same as repurposing
Cropping a landscape video to a vertical frame gets the dimensions right but does not fix the bigger mismatch. Polished, ad-like footage underperforms on TikTok regardless of its aspect ratio. The framing and tone need to change, not just the shape.
Reframe around a hook, not the original structure
A longer video's structure, with its intro, context, and main point, rarely survives the trip to TikTok intact. Pull out the most interesting moment or claim from the source and build a short new piece around it as the opening, rather than compressing the original structure into a shorter runtime.
Add a layer that feels native to the app
A trending sound, on-screen text that mirrors how captions are typically used on the platform, or a direct-to-camera addition can make repurposed footage feel like it belongs on TikTok, rather than looking like an import from somewhere else.