You don't say which your "bog standard webcam" you have - but most basic webcams have an Image Orientation section under Webcam Settings (Advanced) which is supported by Windows. Many people don't realise they have it.
Huawei P10 review
1995-2015: How technology has changed the world in 20 years
How VR is being used to simulate space
New iPad, iPhone SE & Red iPhone 7 on sale now
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.