If you see a yellow bar - click in and select Run Add-on
Select RUN
If it won't register - you have a bit more work. Click on the bottom paragraph HERE
You'll go to the AXIS website and you'll have to install in manually.
You can select OPEN
It will download some files and you'll have to select AXISMediaControlSDK - open it....
Select RUN

Next
Click to accept the aggreement and select NEXT
NEXT
Install