Skewing PC clock

Hi: This probably as nothing directly to do with WSPR, but has anyone nothing their PC clock, and hence decodes, change after playing videos? I just watched maybe 10 short videos, and my clock drifted 5+ seconds! That's within a few hours..
bewildered.. KB2MEN

Submitted by KB2MEN on Wed, 2017/01/04 - 00:30