Thailand's national Buddhism body has announced it is monitoring monks for any inappropriate behavior following complaints prompted by a video showing Buddhist monks flying on a private jet.

The YouTube video that emerged recently showed one of the monks wearing stylish aviator sunglasses, carrying a luxury brand travel bag and sporting a pair of modern wireless headphones. It attracted criticism from Buddhists nationwide.

The director general of the National Office of Buddhism, Nopparat Benjawatananun, said on Monday that the agency had warned the monks from a monastery in Thailand's north-east not to repeat the lavish behaviour seen in the video.

Buddhist monks are supposed to adhere to Buddha's teachings of simplicity and self restraint, and not own any objects at all. This monk holds a pot to collect alms. Photograph: Damir Sagolj/Reuters

A country with the world's largest Buddhist population, Thailand has attempted to help Buddha's 2,600-year-old doctrine stand the test of time through a variety of means, including imposing a ban on the sale of alcohol on religious holidays. The efforts, however, are sometimes tainted by the Buddhist monks themselves.

Last year, about 300 out of 61,416 Buddhist monks and novices in Thailand were reprimanded – in several cases removed from the brotherhood – over misconduct ranging from alcohol consumption to having sex with women and extortion.

The agency also received complaints about monks driving cars, as well as scams and false claims of black magic by monks.

Nopparat said the monks in the video were acting "inappropriately, not composed and not adhering to Buddha's teachings of simplicity and self-restraint".

Monruedee Bantoengsuk, an administrative officer at Khantitham temple in Sisaket province, confirmed to AP that the monks on the private plane lived at the temple but refused to give details about the trip.

"We can explain this, but not now," she said, saying that the abbot, who appeared in the video, is currently on a religious tour in France.

The images from the video contrasted with the abbot's message on the temple's homepage that read: "The true core of those who preach Buddha's teachings is to not own any objects at all."

Nopparat said: "When Lord Buddha was alive, there wasn't anything like this. There were no cars, smartphones or cameras, so the rules were much simpler.

"While the monks need to keep themselves abreast of new knowledge, current events and technology, they are restrained to choose the appropriate tools."

He said one way to prevent the monks from misbehaving was for followers not to spoil them with valuable objects or vices. "In many cases, it was the followers who gave the monks the luxury. Some bought them sports cars. This is by no means necessary."