On Android, from FDroid you can install an app called Seal, which is a minimal frontend for yt-dlp. I discovered it while trying to circumvent issues Newpipe was having with some update to the YouTube API.

Unlike Newpipe forks, which can use the sponsor block API but not when downloading the video directly to your device, Seal allows you to input the custom flags available from the yt-dlp cli, so you can automatically skip annoying sponsor mentions even on your downloaded videos.