fix: scene accessibility when only later scenes are inaccessible

[Wcarr112]

There was a bug with this for loop where the order of the video files impacted the final state of the video's accessibility flag. Proper logic should be marking a scene as accessible if any video exists.

Repro

• Have 1 scraped scene
• Download 2 video files for it
• Have 1 video file be mounted and accessible and another not be mounted

When the for loop runs, if the non-accessible video file appears later in the files list, it will mark the scene as not accessible even though another video file exists.