I've just got the full URLs. Microsoft is for https://www.microsoft.com/store/apps/9PM4ZSJWHFHS so I guess it was some app they wanted removing from the store and play.google.com was for a video downloader: https://play.google.com/store/apps/details?id=video.download...

Full list:

https://yt1s.mobi/en88/
https://yt1s.mobi/en89/
https://yt1s.mobi/en90/
https://yt1s.mobi/en91/
https://yt1s.youtubemini.com/
https://y2mate.tools/en59ac/yt1s.html
https://aulavirtual.ins.gob.pe/blog/index.php?entryid=5488
https://www.facebook.com/105111868246057/posts/httpsyt1scomfor-mp3-httpsmp3downycom/105114161579161/
https://soundcloud.com/jameshaskins928/yt1s-com-richboytroy-beginning/sets
https://yt1s.info/
https://www.similarweb.com/website/yt1s.com/competitors/
https://www.saashub.com/compare-yt1s-ltd-vs-youtube-video-and-audio-downloader?ref=sidebar
https://addons.mozilla.org/en-US/firefox/addon/yt1s/
https://xranks.com/alternative/yt1s.online
https://qnnit.com/yt1s/
https://www.trustpilot.com/review/yt1s.com
https://m.apkpure.com/yt1s/com.technologygateway.video_downloader
https://b.trafo.no/6d/yt1-youtube-downloader/pages
https://www.cyclonis.com/es/is-yt1s-com-safe-to-use/
https://yt1s.works/ena/
https://nz.trustpilot.com/review/yt1s.com
https://us.host-tools.com/website-status/yt1s.com/http
https://en.y2mate.is/266/
https://ssyoutube.com/en620/
https://snapsave.io/en45
https://save-from.net/en19/youtube-video-downloader
https://gotranscript.com/youtube-downloader
https://y2mate.tools/en59ac/
https://tubemate.net/
https://www.freemake.com/free_video_downloader_paradisiac/
https://yt-convert.com/en20
https://chrome.google.com/webstore/detail/video-downloader-professi/elicpjhcidhpjomhibiffojpinpmmpil?hl=en
https://www.softwaretestinghelp.com/free-youtube-video-downloader/
https://www.dvdvideosoft.com/free-youtube-download-en2
https://addons.mozilla.org/en-US/firefox/addon/easy-youtube-video-download/
https://www.vlogr.com/features/youtube-downloader/
https://newpipe.net/
https://ytshorts.savetube.me/3
https://www.youtubedownloaderhd.com/download.html
https://ytmp3.nu/58c/
https://en.wikipedia.org/wiki/Comparison_of_YouTube_downloaders
https://ytmp3.nu/CeFA/
https://ytgoconverter.com/en_us/youtube-to-mp3-converter24/
https://tomp3.cc/ent77no
https://x2download.app/en69/download-youtube-to-mp3
https://ytmp3.cc/2e8/
https://listenvid.net/us_131f1/
https://savemp3.net/9vpv2/
https://yt5s.io/en82/youtube-to-mp3
https://yt-convert.com/youtube-to-mp3-20
http://wiki.coursemerchant.com/6d/youtube-to-mp3-converter/pages
https://www.movavi.com/learning-portal/best-youtube-to-mp3-converter.html
https://www.getsubly.com/post/youtube-to-mp3-converter
https://techjury.net/best/youtube-to-mp3-converter/
https://www.dvdvideosoft.com/en11
https://yt1s.mobi/en69/youtube-to-mp4/
https://4kdownload.to/en1/
https://y2mate.tools/en59ae/youtube-mp4
https://notube.site/es/youtube-app-v52
https://www.ytbvideoly.com/d7-youtube-to-mp4/
https://10downloader.com/en/62/youtube-to-mp4-converter
https://www-ytmp4.com/
https://ytmp4.tube/
https://yt1s.de/youtube-to-mp4?l=en18
https://plugin.crimple.co.uk/z/ms/x7v/youtube-converter-mp4-converter/pages
https://x2download.app/en77
https://en.savefrom.net/21-youtube-to-mp4-1.html
https://ytmp4converter.com/en/
https://youtube4kdownloader.com/en71/download-youtube-4k-mp4.html
https://y2mate.la/download-yt-to-mp4-en1/
https://yt-convert.com/youtube-to-mp4-20
https://ytmp4.top/en1/
https://ssyoutube.com/en623/
https://ssyoutube.com/en624/
https://ssyoutube.com/en625/
https://ssyoutube.com/en626/
https://www.4kdownload.com/products/videodownloader-29
https://play.google.com/store/apps/details?id=video.downloader.videodownloader&hl=en&gl=US
https://www.microsoft.com/store/apps/9PM4ZSJWHFHS
https://y2mate.com.co/en6
https://givefastlink.com/allvideo/
https://www.yt2conv.com/youtube-downloader-53/
https://addoncrop.com/v17/youtube-downloader/
https://ytshorts.savetube.me/
https://youtube4kdownloader.com/en71/cut-youtube-video.html