Toward the end of October, GitHub removed the repository for the youtube-dl utility, which provides a means to
download video content from various streaming sites, such as YouTube.
The repository was replaced
with a cheery notice that it had been
removed due to a DMCA
takedown. It will likely come as no surprise that the DMCA action came
from the Recording Industry Association of America (RIAA) or that the
complaint was that the program circumvented the “technological
protection measures” used on the videos by YouTube and other authorized sites.

Source: LWN.net – [$] The RIAA, GitHub, and youtube-dl