FRIDAY American Video Awards (ABC, 9-11 p.m.): Tony Danza is host for presentation of music-video achievements as MTV invades ABC.
Musical Comedy Tonight III (PBS, 9-10:30 p.m.): ``Great Performances'' presents Sylvia Fine Kaye highlighting songs and scenes from early musical theater. SATURDAY
College Football (CBS, 1:30 p.m., Ohio St. vs. Michigan; ABC, 3:30 p.m., Nebraska vs. Oklahoma): Live football, subject to last-minute schedule changes.
Chase (CBS, 9-11 p.m.): Thriller with just a touch of social conscience as urban lawyer Jennifer O'Neill defends migrant worker. SUNDAY
Ewoks: The Battle for Endor (ABC, 8-10 p.m.): George Lucas presents scary special-effect sequel to recent overrated ``The Ewok Adventure.''
Mussolini: The Untold Story (NBC, 8-11 p.m.; also Monday and Tuesday, 9-11 p.m.): History as spaghetti opera, with George C. Scott posturing as Il Duce.
The Plant Hunters (PBS, 8-9 p.m.): ``Nature'' probes scientific efforts to save endangered plants.
Turumba (PBS, 10-11 p.m.): Final segment of ``Silk Screen'' series, which investigates Asian-American values. MONDAY
Anna Bolena (PBS, 8-11 p.m.): ``Live From Lincoln Center'' presents Dame Joan Sutherland, singing Donizetti's bel canto opera.
NFL Football (ABC, 9 p.m.): Seattle Seahawks and San Francisco 49ers, live. TUESDAY
Comet Halley (PBS, 9-10 p.m.): Examines the facts, legends, and allure surrounding this once-every-76-years visitor. WEDNESDAY
God's Country (PBS, 9-10:30 p.m.): French director Louis Malle presents a colorful portrait of life in rural America: Glencoe, Minn.
Rio Sao Francisco With Germaine Greer (PBS, 8-9 p.m.): ``River Journeys,'' one of TV's best travel-adventure series ever, continues upstream. THURSDAY
Thanksgiving Parades (CBS, NBC, ABC, starting 9 a.m.): Check local listings for parade specials and features in morning shows and news reports.
The Bill Cosby Show (NBS, 8-8:30 p.m.): What better family fare than the Cosby family on Thanksgiving night?
The Patti LaBelle Show (NBC, 10-11 p.m.): Holiday music with guests Cyndi Lauper and, what, Bill Cosby again?
Please check local listings, especially for PBS programs, since local option sometimes results in different times and days.