Suggestion

I have some suggestions "on the Local YouTube video downloader", like adding a green Download button next to the subscribe channel button, language change and making a better Download UI. The UI could look like this, the download button instead of save to album or next to the subscribe button with an option to choose between audio and the video format with the quality.

My professional Paint skills

Start by locating the Local YouTube video downloader UI and compare its current controls with the linked mockup, especially the subscribe channel and save-to-album areas. The scope is not decided: completion would require an agreed design covering the download button, language change, audio/video format selection, and quality selection.

Written by the indexing model from the issue text.