There are so many different accents in South Africa. The accent on display in this video in particular is of a native English speaker from the southern part of the country.
The British came to South Africa in the 1800s and to this day, the south west has the highest proportion of native English speakers compared with the rest of the country.
The accent of native English speakers in the southern part of the country is closer to the British accent. Native English speakers from the northern part of the country tend to monophthongise their vowels, so “I like survivor” comes out as “Ah lahk servahva”