The definitions of syncopation I've come across generally talk about stressing the offbeat (see, for example, Wikipedia) where "offbeat" sometimes refers to placing the accent in between beats (on the "and") and in other cases it's about emphasising the weak beats (such as beats 2 and 4 in 4/4 or beats 2 and 3 in 3/4). Most explanations of syncopation include only these basic examples.
More generally though, syncopation is about subverting the listener's rhythmic expectations and interrupting the regular metric patterns. I feel like this broader definition would include putting unusual emphasis on beat 3 in 4/4 even though, as far as I understand, beat 3 is not usually considired "weak" of "offbeat".
OVERWERK — Canon was the track that prompted my question, though in this example the effect I'm describing is heard on the hypermetric level, which complicates things. After 0:35 there's a clear grouping of measures into 4-measure phrases ("hypermeasures") where the emphasis on individual measures ("hyperbeats") follows the usual 4/4 pattern of strong-weak-medium-weak. After 0:47 though this pattern is subverted and replaced by medium-weak-strong-weak, and this new pattern then governs most of the rest of the track. (The hypermeasures don't merely shift their starting points: 4-measure phrases clearly continue to start on the "medium"-accented measures.)
Would you call something like this syncopation (hypermetric syncopation in this specific example)? Perhaps there's a more appropriate and specific name for that? Or maybe I'm ovethinking things and this metric device is what it is and doesn't need to be called anything special?