seems like this
;With CTE (Seq,date, originid, originname, [origin desc], [origin desc other],origintype)
AS
(
SELECT ROW_NUMBER() OVER (PARTITION BY originid ORDER BY date),
date, originid, originname, [origin desc], [origin desc other],origintype
from origindept
)
SELECT c.date, c.originid, c.originname, c.[origin desc], LEFT(t.u,LEN(t.u)-1),c.origintype
FROM CTE c
OUTER APPLY (SELECT [origin desc] + ','
FROM CTE
WHERE originid = c.originid
AND Seq>=2
FOR XML PATH('')) t(u)
WHERE c.Seq=1