Realmente diminui o processamento de CPU, uso de memória e rede. Dependendo da qualidade, chegou a 50% de melhora em CPU. Em rede houveram melhoras significativas, porém em memória RAM não chegou a ser muito expressivo (136 Mb).

Messirveeee

Usually very buggy

After playing a few videos it starts to cause unwanted reloads

Great! Particularly useful for long videos where you only see one person talking non-stop, with no other images, illustrations, graphs or anything useful to see.
I just stumbled on a video like that, and remembered I saw this extension. Installed it immediately.

no longer working on youtube or youtube music.

Very good but I think it would be a good idea to have this work only in current tab/window, for example if you were to watch a video while playing music in the background, you should be able to have video turned ON for one of them and OFF on the other one.

This app doesn't appear under Firefox Addons on Android 9 device. Can download file but this seems to be of no value as it can't open or perform any function.

Sometimes bugs out but usually not too problematic. It could use an option to still load video thumbnails instead of a black screen.

works with little issue. It makes for less interruption to music and that is always gr8!