Want to download this episode? Use youtube-dl, it's great!

C-æ mc/mark-next-like-this

Find and mark the next part of the buffer matching the currently active region, while also keeping the current region. Get it here.

C-x r y yank-rectangle

Yank the last killed rectangle with upper left corner at point.

H-SPC set-rectangular-region-anchor

Think of this one as `set-mark` except you're marking a rectangular region. It is an exceedingly quick way of adding multiple cursors to multiple lines. Get it here.

C-x C-q dired-toggle-read-only

Edit dired buffer with Wdired, or set it read-only.

C-Æ mc/mark-all-like-this

Find and mark all parts of the buffer matching the currently active region, while also keeping the current region. Get it here.

C-x C-e eval-and-replace

Evaluate the last sexp and replace it with the result. Get it here.

M-x kmacro-name-last-macro

Assign a name to the last keyboard macro defined.

M-x insert-kbd-macro

Insert in buffer the definition of kbd macro NAME, as Lisp code.