At first glance, a tool like "YouTube by Click" (and its many imitators) seems harmless. It usually manifests as a small button nestled next to the YouTube player. One click, and the video is yours. It transforms the ephemeral stream into a permanent file.
: It can convert videos into various formats such as AVI, FLV, WMV, 3GP, WEBM, MKV, and WAV.
Widely considered the standard for high-quality, stable desktop downloads with regular updates.