Put yourself into the shoes of the decision-maker. If you can skim through some text, or listen to a short audio or watch a quick video to acquire some chunk of information or garner a bit more insight into some topic, why on earth would you burn all the time required to have a face-to-face meeting? You wouldn’t.
As a sales pro therefore, you must post text and/or audio and/or video – and lots of it – to provide that info and insight at the exact instant the buyer wants it.