[michaelt]

According to https://link.twitch.tv/storage Twitch's limit is 100 hours stored total, not just per-video

So you'd hit the limit after 600 ten-minute videos, or 100 hour-long videos.

The limit also seems to apply to "Highlights" and "Uploads" but not to "Past Broadcasts", "VODs" or "Clips" for added confusion.

[rincebrain]

As pointed out elsewhere, past broadcasts/VODs had an autodelete horizon added years ago, so after a certain point, you'd have to reupload your content if you wanted it archived in perpetuity.

One might imagine this is just the logical followup of them adding that horizon initially, basically saying "the 1 in 200 of you who circumvented our policy, no, for real, stop that."