[D] Best RNNs deep dive video/article/post ?

I'm learning RNN's, and every article and video I came across so far misses some details, no one is explaining everything in great details. I prefer reading or watching a material, where author is writing code not using ready RNN functions and is explaining everything in details like Andrej Karpathy would. (I read Karpathy's blog post on RNN, but there was no much code related to RNNs and article was mostly about LSTMs)

andrej karpathy article author code deep dive every everything functions machinelearning material reading rnn video writing