Imma check that out. Casting support/breakage may end up being an issue, but thanks.

So YouTube should build a way for creators to tag sponsor content, and a system to skip it. Despite them not profiting off said content.

It would just create a new arms war of disguising sponsor content, or only including little bits throughout the video. Can the system tolerate 3 sponsor blocks? What about 15 blocks, what about the sponsor playing in the little insert with no audio, how does the blocking work then? If the sponsorblock is imperfect, their official tool either removes legitimate content, or doesn't work well enough - both piss off the viewer and have made the platform worse.

Or, YouTube accepts no responsibility for what does not cause them a lawsuit (like with DCMA/ContentID), or directly lose them money (ad blocking without premium).

If your preferred creators are putting scams or excessive sponsor spots, either report them, start financially supporting them or stop watching them. Many responsible creators have patreons or alternative services that they don't do that shit on.

I dislike most sponsor spots, I agree with you, and wish my android box supported sponsorblock properly, but I don't think it's YouTube's responsibility to help me - the creator felt it should be in the video - not YouTube.

Suggested content that is not on a service you are signed into or pay for are inarguably ads.

It's no different to "Get Disney+ to watch this show"

Give me HQ, this is too good to stay in JPEGiness