User Agent

[anpic]

Describe the feature you want

please add option to set custom User Agent string

Is your feature request related to a problem? Please describe it

no

Additional context

How will you/everyone benefit from this feature?

replace default UA for testing

[Stypox]

Please follow the issue template when creating an issue, don't just delete everything! If you had followed it, I would know what the purpose and the advantages of this would be. Pleas edit the issue by copy-pasting the template. Also do it for #3520 #3522 #3523

[opusforlife2]

Related: #3136.

[Stypox]

I'm closing this since I really don't see why it would be useful, and nobody provided a reason for it. Testing is done in the extractor, not in this repo, so this issue should be there, but anyway I don't see what would be the purpose of changing UA