It sounds like you're interested in the HI3798MV100 — a very common but now legacy MediaTek (formerly HiSilicon) ARM Cortex-A7-based SoC. It powers a huge range of cheap Android TV boxes, IPTV receivers, and OTT dongles (e.g., from Huawei, Mecool, X96, MXQ).
For those interested in learning more about the Hi3798MV100 firmware, the following resources are available: hi3798mv100 firmware
The Hi3798MV100 serves as a cost-effective multimedia gateway. Key hardware specifications include: Memory Support: It sounds like you're interested in the HI3798MV100
"The catch," @deadflash typed, "is that you have to short two pins on the NAND chip while you power it on. Hold them together with a pair of tweezers for exactly seven seconds. If you let go at six, it stays dead. At eight, you let out the magic smoke." At eight, you let out the magic smoke