But it's real?! It seems incredibly absurd that it could actually overflow, how are signed values useful for a count of views? How are you going to have negative views?
http://stackoverflow.com/a/1555186/67591
TL;DR: Google's C++ coding standard says: "Document that a variable is non-negative using assertions. Don't use an unsigned type."
As someone who has written a lot of C++ code to interact with hardware: I view an unsigned as a bucket of bits, and a signed as a number.
video_B.views > video_A.viewsGiven that switching to unsigned saves you exactly one bit, it's just not usually worth it. How often do you need exactly 32 bits of unsigned space, when 31 isn't enough, and you can't use 63? (I'm talking about standard-length integers here, not extreme situations where you're trying to make maximum use of 8 bits of storage or similar.)