One of the founders here! No it's not. The max video length is up to 2 min, which is also the case in any non-free tier. We just include a 15-second option for that tier (because people it need for things like FB ads)

In the post you talk about 5–10 minute explainers.

What does one do if they want to make a 5-10 minute explainer if the maximum length is 2 minutes?

Maybe clarify it a bit. Eg. "Short 15 second option".