VK videos can be played on an iPhone by installing a third-party application like BK Player. It is available on the iTunes Store and supports up to iOS 6.
VK is a social network, and videos are part of the functionality. Third party apps like the BK Player simplify the process of playing videos; without it, the app needs to sync with iTunes.
As well as playing videos, the BK player also plays audio. In terms of video, it offers playback in a number of different qualities, and it has a cached mode so that videos can be played when the iPhone is not connected to the Internet. It also allows the user to play videos uploaded by their friends on VK. These videos are found in lists and albums, but the app also allows the user to search.
It is possible to play YouTube videos using apps like the BK Player if the user experiences difficulty playing the video from within the main VK app. The VK app is available on iTunes and works on Apple operating systems up to and including iOS 8. It also works on the iPhone 6 and the iPhone 6 Plus. It is made by VKontakte, although most of the support is unavailable in English.