This video from the USA says about itself:
2 July 2016
Chestnut-Sided Warbler singing “see see see Ms Beecher” or (“please pleased pleased to meecha” depending on your ear) at 6 thousand feet in the Great Smokey Mountains in classic brush and scrub tree habitat. Like most Warblers these are very difficult bird to capture on video – always on the move.
I was privileged to see these birds wintering in Costa Rica.