CarGuo / GSYVideoPlayer

Video players (IJKplayer, ExoPlayer, MediaPlayer), HTTPS, 16k page size, danmaku (bullet chat) support, external subtitles, support for filters, watermarks, and GIF screenshots, pre-roll and mid-roll ads, multiple simultaneous playback, basic seeking/dragging, volume and brightness adjustment, play-while-cache support

aleixrodriala / newtube

SmartTube for phones, unofficial: an open-source YouTube client for Android. Background play, PiP, SponsorBlock, DeArrow, save for offline, code sign-in.

SysAdminDoc / HushFacebook

Hushfacebook Morphe patches for Facebook. Hide ads, suggested posts, save videos and photos, tune playback and Reels, and use a focused Marketplace mode, and much more.