Please add a feature which can reduce size of video but not the video and audio quality. Thanks

Hello 4K Video Downloader Creative Team. My request is that would you please provide a feature in your video downloader wherein user can reduce the size of the video according to his choice but it should not affect the original quality of video and audio. For example if I need to download a video of one hour and more of HD quality and the size is more than 1gb . Then I should have the choice of reducing the size to 200 mb or so without harming video and audio quality. If possible please provide this option. Also please provide "VIDEO GRABBER and BROWSER INTEGRATION OPTIONS" which grabs videos automatically from any website in all formats. Thanks.