There's a lot of things I would like to see that may not necessarily be good for premium membership perks but I'll list them anyways.

• Custom emotes! YES
• Overlay support in house would be cool(you have some already which is nice), with customisation.
• Proper links in chat
• Better chat in general with options for timestamps, etc.
• I like the idea of more vod storage, maybe up to a month or 2 week instead of one week. Don't need them to exist forever as people tend to care about more recent stuff imo.
• Maybe low latency mode (like twitches where you get it down to like 2 seconds) I know that kinda feature could be expensive to run (it's probably very hardware intensive)
• Maybe you could add per channel custom emotes that people can like buy with gems, the gems go to the streamer with maybe a bit to vimm aswell or maybe burn some of them as a fee to keep supply undercontrol? Would make a nice use case for gems.
• Animated profile pics? xD
• Maybe access to a premium discord channel?
• Fancy premium member badge is a must. =p

Would the premium membership have benefits for both streamers and viewers or is it more tailored for streamers?