Converting Quicktime Video Screen Capture to smaller file sizes


I have about 10 longer Quicktime Video Screen Capture files which are massive (10+GB). I was wondering if there is an app or software that I can bulk shrink the file sizes and/or convert to H.264?

I have google searched for this but most of the search results that I get are junk spammy software.
I am either looking for a reputable paid software or a good freeware/open source software.

I am using Mac OS Catalina

Thanks a lot!