Hello,
Really glad to see someone who worked on Karaoke Mugen stumble upon this and thank YOU for Karaoke Mugen ^^
I made a new version that should automatically update the media list to the database, using the api (well, it's only making a Get request to http://kara.moe/api/karas to obtain the full list so I don't know if that qualifies as "using the api" but that seems to work).
I didn't have any issue though (apart from the fact that the most recent songs were missing). If there are still problems on the new version, could you give me an example of a video that is not playing so that I could investigate ?
By the way, did you make sure to press the play button on the top right after adding songs to the database (I know that some people did not see that they had to use the top right menu to launch / continue the karaoke).
I also joined the Discord as you suggested.
Thanks again !