Add --save-name feature

[mattm3]

Is your feature request related to a problem? Please describe.
Not related to a problem.

Describe the solution you'd like
This feature is included in Freevine (https://github.com/stabbedbybrick/freevine) which is where the idea comes from. When using the --save-name arguement you can set a custom output of the filename, for example if you were downloading Taskmaster you can have --save-name "Taskmaster - S01E01 - Melon Buffet (1080p WEB-DL H264)" rather than the way Devine currently names downloads. This is handy for services like BBC iPlayer as their naming can be all over the place when comparing to TheTVDB.

Describe alternatives you've considered
The only alternative is to rename the file when downloaded.

Additional context
I hope that's enough info needed.

[billybanana80]

I second this request. Would be a handy feature to have - I personally name all my downloads in the format "S01E01" from the get go with other tools that allow it. In conjunction with a queue type feature (as requested in Download episodes via playlist #108) I'd be a happy camper.

[mkjustuk]

Thirded, I use this feature in Freevine and it's really useful to get perfectly formatted filenames prior to other tools then using it from there.