The Bilibili player may have a memory leak, especially in older versions (v1.x). If the process consumes >500MB of RAM for a single 1080p video, your system may slow down.
Are you trying to or looking for ways to convert surveillance footage into a more standard format? SSF Files with BKPlayer.exe – Part 2 - Spreadys.blog bkplayerexe
Legitimate Baidu Player does not need to run on startup. To disable it: The Bilibili player may have a memory leak,