The 1GB filesize limit for uploading motion graphics templates to libraries is unworkable

I'm a visual media coordinator in a university and am responsible for maintaining our brand identity via all of the content creators we work with. I'd like to be able to use the Adobe libraries for this, as it's useful to be able to share with selected users and also offer editable templates like lower thirds, titles etc.

I'm trying to create MOGRTS with some updated branding but am unable to upload any of our new brand assets because there is a 1GB filesize limit. The videos we have use transparencies for transitions so I need to use the ProRes 4444 + alpha codec. I can just about manage with a couple of short 1080 HD assets but there's no chance with the 4k/UHD assets as the idents are around 5GB for a few seconds of footage.

Is this something that can be addressed? My only option now is to dump everything on cloud storage, but them I lose the control over users and how they use the assets, plus I can't keep everything relevant and up to date. This 1GB filesize limt just seems like a legacy arbitrary figure that was probably once workable for older video formats, but needs addressing for higher resolution video content - I think we need at least 5GB in this day and age.