Assuming 8 hours/day average of active screenshots every 5 minutes, would be (8*60)/5 = 96 shots per day. Times 3650 for ten years is 350,400. Divide by 60fps is 5840 seconds, by 60 is 98 minutes. So a decent movie length, as a single video.

Though, I imagine it'd be unfeasible to go through every screenshot and remove sensitive information.

(At a rough ballpark: if it took 20 seconds on average, to analyse and either bin or selectively-censor each screenshot, it'd take about a full working year, 8 hours per day.)