About Andrew Ng course [D]

I have recently into ml field learning from the basics. I have came across many old comments in reddit stating that Andrew ng course on Coursera is one of the best and "it's free too". And found out that he changed that. Then found this course on YouTube by Andrew ng on ml https://youtube.com/playlist?list=PLoROMvodv4rMiGQp3WXShtMGgzqpfVfbU

So is there any difference in his current Coursera course and this old playlist by Andrew ng on ml.

And also if anyone having any index …

andrew andrew ng beginners course coursera current difference index machinelearning playlist