The email you have received has to do with the Cloud storage space that comes with a free RealTimes account. RealPlayer Free - cloud storage will be discontinued under this plan. If you're currently using storage under the free plan, you can download a copy of these files before February 28, 2017. Please note that any files remaining after that date will be removed and no longer accessible. This will not impact the videos stored on your computer.
If you are not interested in upgrading and you don't want to lose any of your Cloud content, please download the files to your computer: Please use the download tool by following this article: https://customer.real.com/hc/en-us/articles/115001641267
Note: You can log into https://realtimes.real.com/account#login and click your name on the top right to view the used cloud space.