Yes, we could have used electricity at almost any point in time. We could have made telegraphs, but most likely, we would have realized just how hot things became during experiments and put the knowledge to a more immediate need and use.
If I traveled back in time to the age where fire was still novel and needed some form of mass communication, I would quickly rule out electricity as a tenable solution.
I might use a system of vines, smoke signals or other more practical solutions, just as our ancestors did.
The spin on TFA was bad, but that doesn't make it uninteresting. The ramifications of our ancestors discovering things earlier, or in a different order does make for entertaining thought. Try not to focus on things like:
- He used a lighter
- He had plenty to eat, so he had time to experiment (he was not addressing an immediate need)
- He may have been cold, but wasn't trying to solve that problem (sort of redundant, but worth mentioning)
- He was not distracted by other marvels that we see as commonplace, such as other uses for clay and fire .. the list goes on
Still, while the video might be silly, the thinking behind it is worth a cup of coffee and consideration.