Open unlinked URL in corresponding app How to open a link in an app if it's not available as a link but as a text, and it can't be opened in the app itself? Is there e.g. some app that can get link pasted from a clipboard and open it?

Example: I have a link to a YouTube video on a web page as a text and want to open it in YouTube app.
Any regular web browser including the default ROM one should be able to do this natively, provided you have said app set as default for that type of link. Unless I misunderstand what you mean.

Just copy the link text from wherever and paste it in the address bar of a (new) tab. If a default application has been set for this type of link it should redirect it there automatically.