That's quite interesting question indeed, and the wording you used to ask makes up for a perfect answer:
Since you asked "Is non libre software required to display youtube videos in the browser", my answer is: Unfortunatelly, in most sites in the Internet, society is forced to run some non-free software (through their browsers). In the technical side: this is done through JavaScript (hereon called JS), but not all JS is non-free, se we mustn't block it completely. In most web browsers, there is either two options: a. Allow all JS. b. Deny all JS. ... and this is bad, because some are indeed free/libre software. This is why we have GNU LibreJS, that only blocks non-free or might-be-non-free JS. Also, to watch YouTube videos, you do need youtube-dl, you can get it from Trisquel's package manager (and repositories), and can also get it from Guix. Both options are good in case some is outdated. However, please do not upload videos to YouTube, and please ask people not to upload videos there, it requires the visitors of the web site to run non-free software. -- - [[https://libreplanet.org/wiki/User:Adfeno]] - Palestrante e consultor sobre /software/ livre (não confundir com gratis). - "WhatsApp"? Ele não é livre, por isso não uso. Iguais a ele prefiro Ring, ou Tox. Quer outras formas de contato? Adicione o vCard que está no endereço acima aos teus contatos. - Pretende me enviar arquivos .doc, .ppt, .cdr, ou .mp3? OK, eu aceito, mas não repasso. Entrego apenas em formatos favoráveis ao /software/ livre. Favor entrar em contato em caso de dúvida. - "People said I should accept the world. Bullshit! I don't accept the world." --- Richard Stallman
