Heyuri likes to eat japanese filenames. If the filename is entirely in japanese it will be completely devoured and replaced with a timestamp. If the filename is partially japanese like this one I'm uploading now: "つくねちゃんとウエライド sm17023154 ノーベルト.mp4", the first part will be eaten and only "sm17023154 ノーベルト.mp4" will remain.