|Website||https://invidio.us (various other instances also available)|
Invidious is accessible at invidio.us although it is free-software so anyone could host it on another domain.
Invidious has no advertisements. If you share an invidious link you can rest comfortably knowing the recipient(s) are not financially benefiting Google.
Invidious provides Atom feeds and an internal subscription system.
The Firefox Addon Peertubeify can redirect Invidious links to the same video hosted on Peertube if available.