message: add links to the videos
diff: @@ -50,7 +50,16 @@ To see an example of this in action, check out [the `hello_world`
  example](examples/hello_world/main.rs), which has a number of comments
  explaining how things work.
  -Salsa requires at least Rust 1.30 (beta at the time of writing).
  +## Videos about Salsa
  +
  +There are also two videos explaining how Salsa works:
  +
  +- [How Salsa Works](https://youtu.be/_muY4HjSqVw), which gives a
  + high-level introduction to the key concepts involved and shows how
  + to use salsa;
  +- [Salsa In More Depth](https://www.youtube.com/watch?v=i_IhACacPRY),
  + which really digs into the incremental algorithm and explains -- at
  + a high-level -- how Salsa is implemented.
  ## Getting in touch
  