Personally, to a degree and in the majority of cases, I think the scenes only seem static until you do something to give extra growth to them. Force of the masses or of high intellect, as has been proved on many occassions but which seems to get frequently forgotten at speed. Time therefore does have some sort of relevance indeed, as does imagination to a huge degree...but having said that I do love this concept of static memories as a thought experiement, and would hope someone will go into the aesthetic significance of what they define as a snapshot, just because I would enjoy reading.
Incidentally, glass being a liquid is an urban myth unfortunately propegated by far too many sources but quite obvious if you try pouring your window over any given period, or by doing some research if you want to get more specific. Maybe a better example would be a plant, its growing and moving, just at a different percepive level to us. At it's own level it appears quite animalistic as anyone who has seen the program "life" could testify to.
Z