It would start fine. In two thirds of the videos, it will restart from zero in the first 60 seconds. And in about one third of the cases, it will also restart from zero after pause. And in some random cases, it will reset randomly just like that. Thus the bandwidth saving can be next to none, adding to the annoyance, and also the time wasted searching for the last moment one has listened to. It is broken. And I have used it for almost a week.

doesn't work and no address to contact for help

Doesn't work

"Required permissions for core functionality:

Access your data for all websites
Access browser tabs

No thank you."
truth

Don't work.

Just repeats the songs and doesn't really help with memory or CPU usage.

Doesn't work, you lose bandwith via double video load.

Required permissions for core functionality:

Access your data for all websites
Access browser tabs

No thank you.

Really poorly written spyware.

Great concept, but unfortunately is non-functional for me; gets stuck in rewind loops and won't play more than a few seconds of audio. Also, this shouldn't need permission for all websites, only youtube.

Not working!

no longer working on youtube or youtube music.

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.