Before you proceed, please fully understand: When you choose to host videos locally, it will cause certain amount of outbound data transfer. Unless you subscribed a fixed bandwidth, or with enough data transfer allowance --- if your plan is pay-as-you-go for data transfer, large bills of outbound data transfer fee may occur.
This is a companion discussion topic for the original entry at https://henrywithu.com/local-video-hosting-in-ghost/