There's been some land disturbance in the not too distant past (since 2010 at least) on the Old Laxey Road and the road itself has been shored up using concrete panel structures next to that house and almost directly above where the landslip is .
The white concrete panels can be seen quite clearly to the right of the house from Charles Guard's video:
https://www.youtube.com/watch?v=TWhGYs4iH-Y&ab_channel=CharlesGuardVideos
And from Google Maps (directly underneath where the barriers are located):
https://www.google.com/maps/@54.2237375,-4.3949454,3a,60y,227.28h,74.38t/data=!3m6!1e1!3m4!1slXkStlS87z2sYdZgpnzd3Q!2e0!7i13312!8i6656
Pound to a penny that the extensions on the back of the house and the road disturbance plus rainfall we've had over the last few years will have been a contributory factor, and made worse by undermining the layers of rockfall which in turn was holding back the vegetation at the bottom of the cliff.
If you go to the top of the Hill towards the tram crossing and look back you will see that the first house has very little in the way of a back garden or even a yard. Its a precipice right next to the back door: yard:https://www.google.com/maps/@54.2229998,-4.3960983,3a,75y,86.9h,75.59t/data=!3m6!1e1!3m4!1s_IaPUDdcJF3lbgjwBkirFg!2e0!7i13312!8i6656
Most of the houses on that side of the road have had extensions built facing out toward the sea. I wonder how many of them have been anchored into the bedrock?
Last Wednesday's prolonged and heavy rain was the worst I've seen in a long time.