You can find more information at https://feddit.rocks/comment/39147, it tries to look all over Lemmy, but doesn’t have enough communities to scan :/
Piped can be more privacy friendly in a few cases, as you don’t need an account for subscriptions or playlists.
Here are some differences to Invidious:
I’ll conclude by saying that I was once an Invidious user. I decided to write Piped at a time when Invidious was riddled with extremely odd bugs and performance issues. Some of these issues still persist to this day. I’ve always kept performance a top priority in Piped. I wanted to create a better alternative to YouTube than Invidious for my use case and threat model. I think I have succeeded in that :)
Is Piped something that you have to self host
No, you don’t have to self-host it. You have a large number of public instances hosted generously by people! You may want to however self-host it however if you don’t live close to an instance, or want to actually own your own data.
Are there instances out there that this redirects to or a single server?
You can switch instances directly from the preferences page. You don’t need to change your URL for switching instances.
Is it a sort of P2P thing where different servers host different videos or parts of different videos?
No, Piped has no P2P aspects at all. What you describe is technically infeasible/difficult since we don’t store videos at all, just proxying them.
How will this be affected by Youtube cracking down on adblockers?
Time will tell, so far we aren’t affected. But, we could be affected when it fully rolls out rather than as an A/B test.
Good to hear that :) Inviting the bot definitely helps it reach more communities, so thanks for that!