didnt watch demo, but i would like to share my short experience
as i commented in another unban request, it´s really hard to catch a wh´er on a 1vs1 map, or an aim_map in CS1.6
it´s very easy to wonder where is hiding the enemy, coz maps are small, and already know the spawn points (3 max, as i saw in 1vs1 server, very close to eachother), so ur aim will be pointing to enemy most of the time, even if u didnt see or hear him
to catch a wh in these kind of maps u must be highly sure, or hack should be blatant
for these cases i suggest to add an auto screenshot, made in the same moment of the ban (even tho some hacks can evade the ss)
Abdoel´s explaining is clever too
banana is a easy map to learn angles on so prediciting where the enemy may be is quite easy
looks like wallhack sometimes, but in this case i think its not