If they are japan/china copyrighted videos of anime (99% are) any host will allow it as you wont receive dmca's mostly because anime can be viewed free on many sites.
Just do not try to go with a major legit host like hostgator unless you own the rights since many do site reviews without your consent and also any type of allegation will get you kicked even tho its just anime.
If your still looking our video hosting platform may be able to help. We even have automatic conversion of mkv video's to mp4, while still maintaining the subtitles. Let me know your interested and I'll shoot you a pm.