Who is watching?
As with any campaign, defining your desired result and audience, dictates the journey the campaign will take and, in this case, which type of video media will work best to fulfil your goals.
What is the core demographic for your service or product and what interface do they use? Most under 40s and absolutely under 25s will be accessing content using a mobile phone. Thus, mobile-friendly video is key and the best platforms for this are YouTube and social media. The more corporate or older viewer is probably on a computer so will be seeing the video on a larger screen (think high-res, not too distracting as to overwhelm) and through your website, LinkedIn or YouTube link.
You may also wish to go a bit more avant-garde and quirky with styling if the under 25s are your customer base. It takes a lot to stand out amongst a saturated crowd on social media and make your voice and brand heard. In contrast, simple, clean and to the point would be better for a corporate/older consumer where their initial attention is possibly a given, due to the more direct nature of the marketing, but they need persuasion to convert.