Quite a few ways to do that, actually. Some SMM panels do this already, no? Or have custom software coded for it so it integrates seamlessly with your existing tools. Whatever the case is, I recommend spacing out the uploads over a 24-hour period than a tighter span of time so you don't instantly get hit with shadowbans and such for spamming. Gonna have to play around the hourly uploads too since different soft rules for different platforms. If you're doing that though and pacing the uploads, it might even be better done manually.