The previous page is sending you to https://support.microsoft.com/ja-jp/windows/windows-10-%E3%81%A7-mp4-%E3%83%95%E3%82%A1%E3%82%A4%E3%83%AB%E3%82%92%E5%86%8D%E7%94%9F%E3%81%99%E3%82%8B%E6%96%B9%E6%B3%95-e0c8d4ae-84bf-85d6-2e0c-686a80f54207.

 If you do not want to visit that page, you can return to the previous page.