Yeah, don't use /r/depression. Too negative. Which is unfortunate.
/r/KindVoice or /r/InternetParents may be better for advice or support. I don't know their state or activity since I haven't used reddit anymore. I enjoyed commenting there before though. And I'd love similar communities here. But I doubt it'd be active with current size and user type.
There's a kind voice discord community. I don't remember if it's from the subreddit directly.
The healthy gamer community may be the best fit. Discord community. The website looks like a sell, but it has tons of free videos and community. https://www.healthygamer.gg/
I will use AVC and HEVC terminology for h264/x264 and h265/x265 respectively.
For video, you get jumps of compression quality from AVC to HEVC, from 8-bit to 10-bit, and from HEVC to AV1.
Depending on your source material, changing compression settings, like target quality, variable bitrate, etc, can also have significant gains. It will depend on your source and target though, and may need some testing to get "right". If you're looking for the best compression, that may be on a file by file basis, because different kinds of video have significantly different compression behavior or concerns. That's likely not feasible for a mass of files though.
Playback compatibility should also be considered. AVC mp4 is the most compatible, right now, if you consider all kinds of and older mobile and embedded devices. If you're fine with modern or desktop, you can go for the best compression codecs.
To PIMP?