A number of YouTube videos are streamed using not only ADP (video and audio on different streams), but each stream being only available using the DASH protocol: not a single URL to an audio or video file, but instead a number of chunks that need to be downloaded and reworked to produce a single file. As a result, those videos were not even displayed in the Video DownloadHelper interface. Version 6.2.0a1 solves this case. Russian locale (87% complete) has been added.
This version fixes a bug where when on a Mac or Linux, ffmpeg is used instead of libav, the add-on mis-detects the converter to not supporting the VP9. As a result, some YouTube are not detected while they are available.