repo contains Arduino sketch that include self OTA support.
ESP32 OTA Demo: https://youtu.be/qCmdUtguwPw
demonstration and code explanation https://youtu.be/FuY6BobS-1k
Just another small demo: https://youtu.be/2J8KK5Cxf6g
Update: removed fingerprint and added rootca certificate for esp8266 but bin file downloading is quite slow now.