So video messages were just announced for Google Chat 🎉
... but not on a Chromebook (ChromeOS) ... or Linux ... or Firefox.
WHY THE HECK NOT?!
ref: Google Workspace Updates: Send video messages in Google Chat
"Video message cannot be recorded on the following browsers and OS: ChromeOS, Linux and Firefox."
Hello!
This is the QA section for the Google Workspace Community, so i doubt that something about a comercial decision will be heard.
I recommend you to post on the feature idea section, so it will be at least given the proper attention.
https://www.googlecloudcommunity.com/gc/Feature-Ideas/idb-p/workspace-ideas-groupidea-board
Hope it helps