There's 100 better ways to handle it than the way it seems to work. What you described is oddly pretty close to how I handle folders in Bloom lol.
Discussion
That's how I'm dealing with watch history in nostr:nprofile1qqsgjw33lfdxfqfftwmkagka340vwpjqumn26wvwv4rawu0gy440z8cpzamhxue69uhhyetvv9ujuurjd9kkzmpwdejhgtcpfemhxue69uhhyetvv9uj2v3sy5crqmrfwd6z2v3sy5crqar0y5erqffsxpjxjumrdamx2u39xgcz2vpsw35x2ffjxqjnqvr4wdjhyfmny5erqffsxp3k7mn5v4h8gtcppemhxue69uhkummn9ekx7mp0pluls5
I'm creating a new list every month to create a dated and paginated series of searchable private lists with note events for the videos watched. Seems to work so far.