I have Characium pringsheimii - i think

After observing my algae from the front pond, I dont think I have Euglena. I may have observed one or two but the large majority of the sample is more characteristic of Characium pringsheimii - http://protist.i.hosei.ac.jp/pdb/images/Chlorophyta/Characium/pringsheimii_2.html

Genus: Unicellular; cell body ellipsoidal or spindle-shaped, attached on a substrate at one end; a single chloroplast plate-like in shape, with a pyrenoid (Guide book to the "Photomicrographs of the Freshwater Algae", 1998).
Their image -

Secondary resource - http://www.plingfactory.de/Science/Atlas/Kennkarten%20Algen/01_e-algae/Chlorophyta/e-source/Characium%20sp.1.html

Their images - 

My microscope video