Personally, I'd just put that sub back in the smaller prefab box for now, assuming that's an option. It sounds great in your test video and it's worth making sure you haven't permanently damaged your sub before you scrap it entirely. Rock that for a while if it's still good and then upgrade the amp and sub together to something like say 300-500 watts rms and then build a custom box for that set up. In that power range I would recommend this dayton sub and this kicker amp.