Try Elixir Casts. Many of their videos are free, which can be viewed either on their official site or on their Youtube channel: https://www.youtube.com/channel/UCEJIWmO9DIE83i6_qmJXqjQ

I made a series of videos on GenServer basics with a few usage examples at omgneering.com (It’s a youtube channel)

On YouTube the Tensor Programming videos are quite good. I found out about them through @OvermindDL1 on this forum. They give a clear explanation of processes, for example.

Also, I understand if you can’t afford it but I’d generally recommend buying content. I know that I typically take videos more seriously if I’ve bought them. If you decide that you can spend a bit of dosh, there’s this thread: https://forum.elixirforum.net/t/are-there-any-premium-videos-for-learning-phoenix/.
I can personally vouch for PragDave’s course and the stuff at Pragmatic Studio.

I have a lot of videos on my channel “The Beam Channel” https://www.youtube.com/c/beamchannel

There is nothing much on Phoenix yet, but a lot on Elixir and Erlang. I am sure I will do some Phoenix stuff at some point.

Check out the Screencasts section of Awesome Elixir:

Then there’s also a similar section on elixir-lang.org: