OVA (Original Video Animation) refers to the original animated video. OVA generally refers to the series mainly distributed by DVD, Blu-ray Disc and other discs, and also refers to some animation series which are smaller than the original and have different contents.

PV is the abbreviation of Japanese MV (Music Video) common name. Both refer to exactly the same thing. Sometimes called music clips or video clips. Translation of Japanese Wiki: ミュージック? ビデォ (music video) mainly refers to the video works produced when the music of pop music is released, including music. Because it aims at selling optical discs, it is generally called プロモーション in Japan? ビデォ (promotional video), abbreviated as poromo or PV, is also very common. Overseas, it is generally called music video or music clip or video clip. ~ ~ ~ ~ Actually, to put it bluntly, animation is a trailer, which will be released before the animation is played.