The jury was shown the footage during testimony of one of the owners of Roundwood Model Aeronautical Club in Wicklow, where Mr Dwyer was a member.
John Flynn was testifying yesterday on the 13th day of the 42-year-old’s trial at the Central Criminal Court.
Mr Dwyer is charged with Ms O’Hara’s murder in the Dublin Mountains at Killakee, Rathfarnham, on August 22, 2012, hours after she was discharged from a mental health hospital. The Cork-born father of three of Kerrymount Close, Foxrock, Dublin, has pleaded not guilty to murder .
Mr Flynn said he knew the accused man “reasonably well”.
Three segments of footage were then shown to the jury, including one of the accused flying a model aircraft at the club on August 19, 2012.
Another clip was shown from that day, described as a family day event. He was asked who he could identify from the clip. “Mr Dwyer and, I believe, his family,” he replied.
He confirmed that there was no event at the club on August 22, 2012.
The jury then heard from members of Shankill Radio Flying Club, of which Mr Dwyer was also a member.
Patrick Kenny was asked about a dead animal being found at the club. “It came to light on the day Mr Dwyer was arrested,” he explained. “It was a sheep… a carcass and wool spread all over it.”
He recalled that it was found early in the summer of 2012 about 10ft to 15ft behind the clubhouse. Under cross examination, he confirmed that he could not be sure about the date.
Earlier, the court heard Mr Dwyer worked a normal eight-hour shift on the day he is alleged to have killed Ms O’Hara. The jury heard evidence from the accountant and manager of A&D Wejchert Architects, where he was a partner.
Siobhán McKevitt took the jury through various records, including time sheets, from the Baggot St firm.
Under cross examination by Ronan Kennedy, defending, she agreed that, according to office records, his client appeared to have worked normal 40-hour weeks on the weeks ending August 19 and 26, 2012.
Pointing to one of the records, he asked her to confirm that Mr Dwyer had worked a normal eight-hour day on August 22. “Yes, that’s what it suggests,” she said, confirming this also appeared to be the case for the following day.
Asked if there was any record of him having left early on August 22, she said there was no notification of him being out of the office on that date.
The trial has heard that Ms O’Hara was last seen in Shanganagh, South Dublin on the evening of August 22. Her skeletal remains were discovered at Killakee on September 13, 2013. A cause of death could not be determined.
The trial continues.