@scoy Give this a try:
Download curl on your pc. Open command prompt. Type the following: (fill in the variables)
curl -vv -k -u <your kasasmart ID>:<your kasasmart password> "https://<your camera internal ip>:19443/https/stream/mixed?video=h264&audio=g711&resolution=hd&deviceId=CAFEDEADBEAFCAFEDEADBEAFCAFEDEADBEAFCAFE" --output <choose your desired directory>\<any file name you wish>.mp4
Now, open the .mp4 file with your favorite media player. I prefer mpc-hd. Enjoy the live stream!

I created a batch file that prompts for the username/password so they are not saved in the batch file.
My master batch file looks something like this:
@echo off
set /p "id=Enter KasaSmart ID: "
set /p "pw=Enter KasaSmart Password: "
echo "Firing up the camera streams...Please wait."
start /min c:\temp\kasa_driveway.cmd
start /min c:\temp\kasa_garage.cmd
start /min c:\temp\kasa_frontdoor.cmd
ping -n 10 127.0.0.1>nul
start "Driveway" /min "C:\Program Files\MPC-HC\mpc-hc64.exe" c:\temp\driveway.mp4"
start "Garage" /min "C:\Program Files\MPC-HC\mpc-hc64.exe" c:\temp\garage.mp4"
start "Front Door" /min "C:\Program Files\MPC-HC\mpc-hc64.exe" c:\temp\front_door.mp4"

Each subsequent batch file looks like this:
REM Driveway:
@echo off
curl -vv -k -u %id%:%pw% "https://<my internal IP for camera>:19443/https/stream/mixed?video=h264&audio=g711&resolution=hd&deviceId=CAFEDEADBEAFCAFEDEADBEAFCAFEDEADBEAFCAFE" --output c:\temp\driveway.mp4