Officials from Spain's Civil Aviation Authority, quoted in El Pais newspaper, said the jet only caught fire after it hit the ground.
That contradicts witness accounts that an engine was ablaze during take off.
Mr Bautista said he has seen - but would not comment on - the video in question.
He said it was not clear whether a fault with a temperature gauge, which led the pilots to abandon their first attempted take-off, could have played a part in the accident.
"A problem with a temperature sensor may not matter at all or it can be very important, depending on what other circumstances accompany it," Mr Bautista told the Associated Press news agency.
"We will have to see what other issues were present."
Mr Bautista said even if one engine had failed, that should not have been enough to bring the plane down.
Footage of the immediate aftermath of the crash site
The authorities say enough information has been recovered from the crash site, including flight data and voice recorders, to thoroughly examine what happened to Spanair flight JK5022.
The results of the investigation, by a team of technicians, with help from US experts, should be known in about a month, the head of the inquiry team said.
Spanair insists the plane was fit to fly, and that there were no short cuts taken before the flight.
However the company has borne the brunt of relatives' anger. The airline has been in financial difficulty, and only hours before the crash, pilots had threatened to strike over proposals to cut staff.
Engulfed in flames
The air disaster was Spain's worst in 25 years.
The Spanair flight, bound for Las Palmas in the Canary Islands, took off on Wednesday at lunchtime with 172 people on board, including 10 crew members.
Only 19 of those survived. It seems they were thrown from the plane into a stream, thereby escaping the flames that engulfed the rest of the wreckage.
Two babies and 20 children were on board the flight, according to Spanair. Three children survived the crash.
Nineteen foreigners from at least 11 countries were on the plane, the Spanish government said. The countries include Germany, France, Sweden, Mauritania, Turkey, Brazil, Indonesia, Bulgaria, Italy, Colombia and Gambia.
This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.