XVideos: Support the JDownloader filename pattern

[smith113-p]

Generated by an automatic template. Can be removed if not applicable.

Scraper type(s)

• performerByName
• performerByFragment
• performerByURL
• sceneByName
• sceneByQueryFragment
• sceneByFragment
• sceneByURL
• groupByURL
• galleryByFragment
• galleryByURL
• imageByFragment
• imageByURL

Examples to test

kvllkkf5aa2_Redhead Angelina Blue. Part 2. Her second lesson, following her Master instruction to masturbate in her tight ropes..mp4
uufkfuc6ba0_Beautiful student has to take her exam.,but she is in trouble, when she is cheating on her exam. Part 1. Her teacher humiliates her, punishes her..mp4

Short description

JDownloader puts the code at the beginning, at least by default, so this PR checks for that in addition to the previously accepted patterns.

[feederbox826]

uhhhhhh I'd much prefer to get a consistent length, since that will match anything up until the underscore and that can leak quite a bit of information

[smegmarip]

@feederbox826 For the old numeric id prefixes (^[0-9]+_), xvideos.com/video.{id}/x didn't work for me - only the old pattern (without the period) worked: xvideos.com/video{id}/x. PR created.