How to enable small window displaying the own camera view in Skype

I'm assuming this is a current version of Windows 10 and a current version of Skype DESKTOP. If so, history should continue to work, add new messages, and show all past messages as well:

I've just tested the following:
Skype DESKTOP, (NOT the universal or web version): Version 7.40.0.151
Windows "Creator's Edition": W-10 v-1709 Build 16299.248

You should find the files here:
C:\Users\CURRENT-USER\AppData\Roaming\Skype\SKYPE-USER\

My "Main.db" file is still there, and is currently about 35 MB. I backed up this whole folder structure, (also adding it to "File History" AND running "RUN NOW" to manually back that folder up, by adding it AS a new library FIRST).

Then I ran my trusty (free) "SKYPERIOUS" database app, on that folder structure where I made a new copy of that folder. ALL my messages from the beginning are still there and being added to in real time. Normally you can just run Skyperious on that folder while live to VIEW or SEARCH messages. Although do NOT attempt to repair or merge databases while Skype is open and live. I did not try the Skype app itself to search, since I find it tedious, at best.

Follow instructions here. Install 7.36 first, then upgrade to 7.41.

Update: You should disable the 7.41 update feature in the following way:

• Replace Skype8 installer from %USERPROFILE%\AppData\Local\Temp\SkypeSetup.exe by installer of Skype7.
• Make file read-only and deny access of your user to this file (requires admin rights).