Looks like oedogonium. The stuff's a pain in the ass to kill. When I was testing algaecides I used this as my model species..It survived copper based treatment quite well...I'd say hit it with excel directly or H2O2.
I have noticed some short-length hair algae on some plants which looks like the pics of oedogonium. The strands on the glass, however, is strange in that for the strands in the patches I see, the entire strand is stuck to the glass, rather than just one end of a strand. So the effect is a patch of curly threads flattened to the glass rather than a hairy appearance. I've never seen it before... Weird and annoying!