The Bible Project

If you are a Christian, or at all interested in Christianity, even just from an intellectual point of view, I highly recommend The Bible Project's series of videos providing an overview of what the books of the Bible are. It goes over each of them in about 5-10 minutes.

They have translations into many languages.

They are done by Christians but I think even from a non-Christian perspective they are probably the best medium-scale overview of the entire Bible I've ever seen, from anyone, in any format. It is really easy to get intensive studies of small bits of scripture, and it is easy to find summaries of the entire Bible in a few paragraphs, but there isn't a lot of this sort of medium-level overview.

And if you find yourself doubting the summaries, you can always cross-check them against the Bible yourself.