Have you checked for updates on Qicktime etc.
Just a thought the camera takes SDHC cards, if you are using cards that are less than class 6 you may get a jerky video as the informations will not be writen to the card quick enough.
What is ransomware and how do I protect my PC from WannaCry?
What I learned from my mentor, Oscar-winning VFX supervisor Phil Tippett
Siri vs Google Assistant
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.