Let's write a simple 'hello world!' PDF from scratch!
This stream is based on https://speakerdeck.com/ange/lets-write-a-pdf-file, a hands-on introduction to the basics of the PDF (portable document format), and write such a file manually in a text editor.
0:00 Setting up...
1:10 Let's start!
6:13 Whitespace
8:30 Signature
11:35 Name objects
13:08 Dictionaries
16:46 Indirect objects
24:08 Trailer
25:35 (Root) Catalog object
27:16 Pages object
30:45 Page object
37:28 Contents object (stream)
46:31 It works!
48:05 Cross-reference table