Delivery platforms have changed quite a bit in recent years.  Between DVD’s, Blu-ray discs, USB sticks, and digital delivery, it can be quite confusing.  Most videographers deliver their couples' films in Full HD 1080p resolution.  DVD’s are not capable of displaying this resolution as they only display 480p standard definition.  You do not want your beautiful wedding footage degraded by putting it on a DVD.  The quality loss is massive.  Blu-ray discs can display 1080p content, but Blu-ray players aren’t as common in households and physical discs are a nuisance. Many newer computers and laptops don't have disc drives anymore. Although 1080p is the standard, many videographers offer 4K. Blu-ray discs cannot play 4K footage. USB sticks can store 4K video files to play on a smart TV, but don’t provide any benefit other than being a physical representation of your film.  The most versatile and universal content delivery nowadays is digital download via services like Vimeo and Google Drive.  You can download the files to any internet connected device and easily shared to any other device. There are online services that mimic a traditional DVD menu, but you are still advised to download your films. You also want to be sure you know what the timeline is for delivery. The last thing you want to do is wait months on end waiting for your finished film. Many videographers offer an Instagram teaser. You'll want to be sure you get it quickly while the wedding is still fresh in everyone's minds.