Same video performed wildly different across platforms. Here's what our testing showed:

YouTube (best ROI):

- 90-second explainer videos worked fine

- Longer watch time boosted rankings

- Production quality mattered most

Instagram/Facebook:

- Had to recut to 30 seconds

- First frame needed immediate value prop

- Captions essential (85% watch muted)

Landing pages:

- 60 seconds sweet spot

- Autoplay killed conversion vs click-to-play

- Above-fold placement tripled completion

LinkedIn:

- 75-second B2B content crushed it

- Native upload beat YouTube embeds 3x

Lesson learned: working with an explainer video production company that delivers multi-format cuts upfront saves time and cost. Reformatting later added $1,200+ and delayed launch by weeks.