Hello @Budi2, welcome to the community! Your post was translated to English by Google Translate since this is a international forum.
I'm afraid that if you by mistake deleted a video you taken, there is no way to restore it without a backup. If you haven't done a backup using Xperia Companion or a manual backup to your memory card or online storage, you can still check https://photos.google.com/, Googles back up for photos and videos. If you've had the Google Photos application active in your phone your video might have been uploaded here.
I really do recommend that you do a back up now and then just so you know that your data are safe, and for photos and videos the pre-installed Google Photos-application is really great option, since it can upload your media to your Google account on the go or when you're connected to a WiFi-network depending on the settings you choose.
I hope you have a nice day!
