Hi...yes hard to tell via video but I would check the following, doing the easiest things first. 1) Check valve clearances. 2)Remove cam tensioner carefully so as to try and keep the gasket in one piece and check how far it has extended as will indicate how much cam chain has stretched. Also ensure tensioner is working correctly. 3) Remove clutch cover very carefully, again to try and keep gasket in one piece and check tightness of clutch/ primary drive and balance shaft retaining nuts. The balance shaft nut coming loose in particular is a common issue.
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