We are constantly working to improve our player security. However, sharing videos online always comes with risks, no matter which platform you use. There is no 100% guarantee that videos will not be pirated, but there are ways to minimize the risk.
Some ways to minimize the risk of piracy are:
Other solutions to prevent unauthorized downloads include digital rights management (DRM) or file encryption, which we don’t currently offer on the main Vimeo platform as it increases the cost of hosting your videos would increase significantly. We want Vimeo to be accessible to as many people as possible.
If you need DRM, an Enterprise account would be great Vimeo OCT a better option for you.