Based on our record, Video Background Play Fix seems to be more popular. It has been mentiond 3 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I found this browser extension which is supposed to do that for YouTube. https://github.com/mozilla/video-bg-play. I rearranged the code into this tampermonkey script. https://gitlab.com/bteastman/block-window-visibility/-/blob/main/Block_window_focus.user.js. Source: about 1 year ago
If this add-on works for you https://github.com/mozilla/video-bg-play You can try setting https://github.com/gorhill/uBlock/wiki/Advanced-settings#userresourceslocation to raw version of this script https://gist.github.com/gwarser/3b47b61863bffcfebe4498c77b2301cd#file-video-bg-play-js and adding youtube.com##+js(video-bg-play) to My filters. Source: over 1 year ago
You can read about how it works and view its source code at https://github.com/mozilla/video-bg-play. Source: about 2 years ago
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FreeTube - FreeTube is an open source desktop YouTube player built with privacy in mind.
LiteTube - LiteTube is an app that provides HQ video and audio streaming players.
LibreTube - An alternative frontend for YouTube, for Android.