WikiVidi was made possible by a slight hack in the Google realtime TTS. It is inefficient and a burden to Google. I have realized this is a sinful, expensive endevour to them. I would like to forward you to the WikiVidi channel where there are plenty of videos about various topics a lot of which also use the nicer sounding Amazon Polly TTS.
My sincere apologies for the inconvenience.

- Kaj Toet