The first two just came out a while ago (October) so it will be a while before they are on Blu ray. You might be able to find a cam if you wanted to enough but...
The first two were just a recap of the series. Probably mostly the same animation with different editing.
Buying resources out of their own pockets, spending energy and effort, with almost no return so that everyone can enjoy the cultural and entertainment products of developed countries at almost zero cost walking in the dark to serve the light, they are real heroes