A video about Tiled, including terrains, isometric tiles, exporting and objects. I also cover how to import the resulting data into pygame.
Timestamps
0:00:00 - Intro
0:02:31 - Fundamentals of Tiled
0:38:57 - Terrains
1:11:04 - Isometric tiles
1:17:27 - Pytmx and Pygame
Github: https://github.com/clear-code-projects/Tiled
Pastebin: https://pastebin.com/dEUVdNip