This is really cool. I'm still struggling to find a good replacement for my use case. I almost exclusively watch youtube on my Nvidia Shield on SmartTube with sponsorblock.
I do use Jellyfin already and I see there is a Jellyfin plugin. Do you know if Jellyfin gets sponsorblock information as chapters? That would probably be an okay solution, even if it doesn't automatically skip them.
other open source mice and trackballs:
ploopy: https://ploopy.co/
jfedor2: