Railscasts sadly is no longer but now the two big ones that operate in that space are GoRails and Drifting Ruby. Some other non-screencast resources I like however are Boring Rails and Playbook Thirty Nine (ebook of tips and tricks from the trenches of a real life smalltime Rails SaaS business)
Currently, I depend on Rails Guides, and I think they do a pretty good job. Would be good to know other resources.
https://guides.rubyonrails.org/