I tend to find videos helpful when I land on something completely new, because they summarise the key points in ~30secs, whereas the page itself takes a lot longer to grok.

I find them unhelpful when:

- the same information isn't also presented on the page - they hide the seek bar, I use this to go over what I find most important

Depends on the target audience for sure. I think most people in software are with you—“just give me text, dammit!”—but I’m my experience selling B2C software, a solid videos drives way more sales than text+photos (ballpark of maybe 20% on a landing page).

This. Great copy and clean UI for the website does a real good job of explaining the product. I personally, dislike watching videos to understand the product, until unless maybe if it is a physical product.

It is said that if people can't understand your product right away, you're doing it wrong. But Slack is very successful and yet people just understand what it is after watching a video of it

I think videos help, Atleast as a user, if I see a video I tend to click on it first (even before reading complete content)