All NPCs and sometimes objects strangely stutter

All NPCs and sometimes objects strangely stutter when I pass them or walk around. This is happening on the game’s save files from the last few days. Everything looks normal on the earlier ones. I put below links to video files recorded on the same day on the same game settings.

NPC strangely stutters during the fight. The last game’s save file used.
The same NPC moves normally during the fight. The game’s save file used from a few days ago.