Yahoo yesterday unveiled a new Web series starring veteran TV anchor Katie Couric, one of a growing number of TV and Hollywood personalities jumping into the online video world.

Couric will host a weekly program on Yahoo, starting next Tuesday, called “Katie’s Take.” On the show, Couric will be doing a lot of what she did first as the co-host of NBC’s “Today” show and then as anchor of the “CBS Evening News,” talking about news and social trends, with a particular focus on nutrition, parenting and health.

Couric, who has a new afternoon talk show syndicated by ABC coming this fall, is appearing on Yahoo as part of an agreement between the Web company and ABC.