Chapters:
2:32 web server demo
4:00 code for mqtt, web server, bitmap
8:12 OV7670 pins and wiring without FIFO
9:31 I²S, DMA overview
12:05 Arduino camera sketch
13:03 I²S init
18:47 DMA init
19:32 I²S start/stop
20:11 I²S Interrupt
21:29 XCLK
22:57 credits
This video explains in detail how to record images with the ESP32 and the OV7670 camera ...