If you are a current user the old user interface of vooPlayer (v3) will be available indefinitely, however you will not be able to create new videos from it. To create a new video, you will need to use the new interface (v4).
Videos for the old version will be supported until August 15th, 2017. After that time they will still play indefinitely but will not be supported. What that means is they will still play on your websites, but if you are having a problem with a feature or something isn't working as expected, our support team will ask you to recreate the video on v4.