Inspect the final-sized label
A label can look crisp in its original artwork and soften in a video derivative. Inspect the actual delivered frame size and colour representation. Chroma subsampling can retain different amounts of brightness and colour detail, so width and height do not tell the whole story.
Choose the smallest real label in the owned production. Include its background and surrounding motion, then render through the intended delivery path. Comparing an isolated still asset with a compressed moving scene can hide which change matters.
Pause to inspect edges, but also watch at the intended presentation size. An enlarged technical artefact and an unreadable audience-facing word are related observations with different importance.
Try one local design change
Compare a slightly larger or heavier label, a change in luminance contrast or a simpler background. Preserve the information hierarchy and avoid adding effects that make the small text busier. Select the candidate based on the words remaining readable during the actual passage.
Do not promise that increasing bitrate fixes a representation that has already reduced the relevant colour detail. Equally, do not change the delivery pixel format without checking the destination. A local graphic redesign may serve the audience more reliably.
Digital video concepts by Mozilla Contributors is available under CC-BY-SA 2.5 or later. The production sample and design choices here are original guidance. Keep the accepted sample with the export settings so a later resize or encoding change prompts a meaningful recheck.
Questions answered
Does a higher-resolution source graphic guarantee crisp delivery text?
No. The delivery scale and colour representation still matter.
Should every small coloured label be made white?
No. Compare a justified local design change that preserves the programme's meaning.
Sources & further reading
Official references for the subjects discussed. Service terms and device software can change.