I am on the 4th under the eave camera today. The first three were analog and the current one is IP HD.
I utilized my cell phone to adjust the view the last time. The wire passes a hole into the aluminum soffit with a bit of that pliable putty on it. In the midwest the aluminum soffits are vented every few feet and here the temperatures go from one extreme to another.
I did change out the included lens for a wider angle 28mm lens which was easy to do. I have had bird do their stuff on the lens and it always washing away with a windy rain. I have no more view now from the trees growing on the right hand side. I have another IP HD camera though that faces the house also with a wide angle few but it doesn't see through the trees. That said there is a third camera from the center of the two garage doors that do get the view in the front. All together though its four cameras that face each other at different angles.
I have seen some spider webs and dead insects but no deterioration. If I look at the area while in the attic I do see light coming from the soffits.
Having the camera mounted on a box is easier to deal with if you need to switch cams. I did brick the first camera after a few months and in an attempt to update the firmware. Thinking though it was the camera that messed up the firmware update and not me.
My IP HD camera is tucked way in the corner where the eave meets the wood trim.
Recently in FL I had to have some work done. The roof is terracotta and where the tiles meet the end of the roof line I had to have that area resealed. The soffit there is sealed with no vent holes. The terracotta roof though has some vents. What had happened though was birds did get into the attic space so I called a roofer and he said that the roof needed to be sealed and I had him do that. The soffits / eaves are all wood. I had them painted / primed a few times before hanging the aluminum gutters during initial construction in 2000. (tear down and new build)
That said the old wood from the old house build in around 1955 had pretty much rotted and was being held together by the paint. Had been fixing it since around '87-8 and it got to be too much here and there fixing so it was decided in the 1990's to tear the house down and start all over again. The old house was at ground level and the new one is elevated some 8-10 feet relating to FEMA new construction codes. The new home though is mostly cement outside with a coating over it.