Everything Looks Like Shot on Video

It is called "Soap Opera Effect" and is caused by higher frame rate. Films are mostly made using "magical" 24 frames/s. I can set my Samsung LED TV to max frame rate of 240Hz and get the same effect. It is possible that when reconnecting you used different HDMI input (that had high frame rate by default) . My TV has separate settings for each input and each mode.

It depends on TV - on my Samsung it is in the Menu -> Picture -> Picture Options -> Motion Plus -> Custom

Two sliders 0-10 allow for Blur reduction and Judder reduction. I have them at 5, 5 but perhaps lowering judder reduction to 4 or even less might be better.

Blur reduction 5
Judder reduction 4