I can't find certain AV that is available on that site and I hate streams so I would appreciate any help from someone who is really tech savvy in this area.
doesn't work for me. Format is unplayable to me, m3u8 extension.You can use JDownloader 2, i just tried it and got around 6MB/sec. The browser plug-in Video DownloadHelper also works. In both cases you end up with a mp4 file.
Post a link to the video you're trying to download, it'll help figure out what the problem is.
Works perfectly fine for me using jdownloader2 just by copying that link.
Make sure you're using jdownloader2 and not the old jdownloader and rename the file before downloading it so the filename is in english, just in case the japanese one is causing problems.