The Flash player used by Bilibili only includes large versions.
Most of them come from Wayback Machine, and a few come from static resource stations from B station.
The player and configuration files used in 2010-2012 are based on the PAD player of Kawata Johi's, and lack the version from the MikuFans period (2009).
The player used in the second half of 2012 to 2018 is a mukio player based on aristotle9, and only contains large versions.
The player used in the new playback page launched in the second half of 2019 cannot be used alone, but can be used through this gadget of mine.
The external library used by B station player, suitable for PADplayer and 2012 play (2013 and later players are already built in), code barrage related.
libBitmap: Dot matrix-related external library, used for bitmap images, see this technical documentation.
libStorage: Store related external libraries for data storage, see this technical documentation.
The sound events used by the B station player, no available audio files are found at present, and the code barrage is related.
Player PADplayer and the Flex class library used by play 15 years ago.