We're loose on You Tube videos as they don't need to be approved by a mod. If you find a direct recording from the original 45 great. Then it's a cut from a mono album. (It's acceptable to use the US original on a UK page) . What we get are CD versions as noted and sometimes TV clips where the artist mimes to the original track. Some contributors are adept at laying original versions over live concert footage.
It's appreciated if contributors indicate it's a stereo mix.
When adding videos it is not always easy to find an exact match to the single in question. It is also a matter of sound quality and listening pleasure. I prefer to have exact video if possible, but most of the clips derive from CD issues. Authentic version in good sound quality hard to find.
Also not sure if that's a requirement at 45cat?