I am under the impression most modern civil aviation radar sensors record the echo's in raw format (asterix). That makes most sense as it allows to replay for investigation purposes and show on display what is interesting and what is not.
A tape recording what has been displayed at the controller display in a one-off. The video cannot be modified for example to add more details.
Also the video will likely require more storage space than the raw digital data in binary format.
Curious which/how many ATC centers are using video for archiving radar data.