I'll roll the dice:
1) ILS/GS NOTAMed
2) APPR lights NOTAMed
3) Visual cues degraded by snow cover
4) RA inop/deactivated?
Looking at the video, I thought they were higher than it turns out they were, until the last second. Short trees outside look "low and far away." The only cue they are low is the obviously high angular speed.