Here's a short video I made with some info on Meta's new licensing model for Llama 2.
One additional point (it's kind of academic which is why I didn't address it in the video, but it's something to be aware of): there's a reason why I didn't say "open source" in the video. Although Meta has touted Llama 2 as being open source, the question of whether it's actually open source or not is a matter of controversy in the open source community.