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							"""
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							 Bing (Videos)
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							 @website     https://www.bing.com/videos
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							 @provide-api yes (http://datamarket.azure.com/dataset/bing/search)
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							 @using-api   no
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							 @results     HTML
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							 @stable      no
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							 @parse       url, title, content, thumbnail
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							"""
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							from json import loads
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							from lxml import html
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							from searx.engines.bing_images import _fetch_supported_languages, supported_languages_url, get_region_code
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							from searx.engines.xpath import extract_text
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							from searx.url_utils import urlencode
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							categories = ['videos']
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							paging = True
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							safesearch = True
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							time_range_support = True
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							number_of_results = 10
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							language_support = True
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							search_url = 'https://www.bing.com/videos/asyncv2?{query}&async=content&'\
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							             'first={offset}&count={number_of_results}&CW=1366&CH=25&FORM=R5VR5'
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							time_range_string = '&qft=+filterui:videoage-lt{interval}'
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							time_range_dict = {'day': '1440',
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							                   'week': '10080',
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							                   'month': '43200',
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							                   'year': '525600'}
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							# safesearch definitions
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							safesearch_types = {2: 'STRICT',
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							                    1: 'DEMOTE',
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							                    0: 'OFF'}
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							 | 
							
							
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							# do search-request
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							def request(query, params):
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							    offset = (params['pageno'] - 1) * 10 + 1
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							    # safesearch cookie
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							    params['cookies']['SRCHHPGUSR'] = \
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							        'ADLT=' + safesearch_types.get(params['safesearch'], 'DEMOTE')
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							    # language cookie
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							    region = get_region_code(params['language'], lang_list=supported_languages)
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							    params['cookies']['_EDGE_S'] = 'mkt=' + region + '&F=1'
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							    # query and paging
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							    params['url'] = search_url.format(query=urlencode({'q': query}),
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							                                      offset=offset,
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							                                      number_of_results=number_of_results)
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							    # time range
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							    if params['time_range'] in time_range_dict:
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							        params['url'] += time_range_string.format(interval=time_range_dict[params['time_range']])
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							    return params
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							 | 
							
							
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							 | 
							
							
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							# get response from search-request
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							def response(resp):
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							    results = []
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							    dom = html.fromstring(resp.text)
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							    for result in dom.xpath('//div[@class="dg_u"]'):
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							        # try to extract the url
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							        url_container = result.xpath('.//div[@class="sa_wrapper"]/@data-eventpayload')
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							        if len(url_container) > 0:
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							            url = loads(url_container[0])['purl']
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							        else:
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							            url = result.xpath('./a/@href')[0]
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							            # discard results that do not return an external url
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							            # very recent results sometimes don't return the video's url
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							            if url.startswith('/videos/search?'):
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							                continue
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							 | 
							
							
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							        title = extract_text(result.xpath('./a//div[@class="tl"]'))
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							        content = extract_text(result.xpath('.//div[@class="pubInfo"]'))
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							        thumbnail = result.xpath('.//div[@class="vthumb"]/img/@src')[0]
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							 | 
							
							
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							        results.append({'url': url,
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							                        'title': title,
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							                        'content': content,
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							                        'thumbnail': thumbnail,
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							                        'template': 'videos.html'})
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							 | 
							
							
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							        # first page ignores requested number of results
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							        if len(results) >= number_of_results:
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							            break
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							 | 
							
							
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							    return results
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