video;
Common enough that Starfleet has an entire department dedicated to the investigation of these instances of temporal displacement.
[ yes, but as people from the 29th century who specialize in matters of time have confirmed, the federation likely wouldn't exist if not for the borg's attempt at unraveling the past. gotta love causality loops. ]
If you are concerned about having to speak with them regarding this matter when and if you're free of the facility, it is highly unlikely that you will retain any memories of your experiences here.