In this video, we will install OpenWRT on Mikrotik Routers. I used the Mikrotik Hap AC2 as an example. The tutorial can be applied on other models, such as the Mikrotik hEX (RB750Gr3), RB3011 and RB4011 since all Mikrotik routerboards share the same common procedures.
** Installing a third party firmware on a Mikrotik router could void your warranty, lost your license key and even brick the router. Therefore, please watch the video carefully and proceed as your own risk **
The video is long, but there are only 3 main steps:
1 - Backup your RouterOS license key
2 - Netboot the OpenWRT initramfs (Initial Ram Disk) with Mikrotik.
3 - Write the OpenWRT image to NAND permanently

Video timeframe:
00:00 - OpenWRT on Mikrotik Routerboards - Common Procedures
01:40 - Backup RouterOS license key
02:44 - Download OpenWRT images/firmware for Mikrotik routerboards
03:09 - OpenWRT firmware for HAP AC2
04:00 - Download Tiny PXE Server and configure the Network Adapter for Netboot
06:49 - Netboot OpenWRT initramfs (Initial…