I downloaded zoom_amd64.deb and placed it in a directory in
/usrlocal/share. In that directory I run:

# apt install -f ./zoom_amd64.deb
...
Note, selecting 'zoom' instead of './zoom_amd64.deb'
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
dconf-cli : Depends: libdconf1 (= 0.38.0-2) but 0.40.0-2 is to be installed
E: Unable to correct problems, you have held broken packages.

I put copy of libdconf1_0/38.0-2.deb in that directory and ran

# apt install -f ./libdconf1
...
Reading package lists... Done
E: Unsupported file ./libdconf1 given on commandline

Installing zoom on Chimaera must be easier than this.

--
Haines Brown