None of those 3 things you listed seems to be an issue or this is the first I'm hearing of them being problematic. Just used the reply button (both quick and advanced) without any issues.
Can you give an example of video posting not working using the newer VIDEO tags?
Page load times pretty good lately. We've had some occasional issues, but usually that's due to some issue w/ the DB or our provider messing up routing tables. Something that would be a problem on any hosting platform.
Granted, I'll give you that we're on old as fuck Vbulletin software and do have issues with multi-quote and sometimes post editing (though the latter is one I can never reproduce), but I think those are both issues because of mitigations we put in place to help with the double posting problem.
The reality is that to get to newer software right now it's not a money issue (yet) as much as a time one, we have to source new software (current Vbulletin software sucks right now and the entire team that founded it have left), figure out how to migrate as much as we feasibly can to that software (e.g. can we save all the posts? migrate user profiles and passwords/etc? PMs? Some of that might have to be left behind), and then flip it all over, while also updating and porting new designs/etc to the best of our ability, ideally executed all within a 24 hour window. We're talking weeks of planning and work to get that right. We're working towards it, but we all work full time jobs in areas not really related to this tech stack, and currently the boards are stable and functional for 99% of what they're needed for.