From controlled to chaos I'm now again moving steady towards controlled :)
uTorrent is by far the best to micro manage torrents.
If your files are scattered around Windows 8/10 has creative tools to form a common pool - but instead I'd suggest keep partitions minimum on drives, use GPT over MBR hmm what else: Get Clover3 or QT Tabbar for File Explorer. Like all of the File Explorer alternatives on MS Store are limited compared to "good" old Explorer.
Get AMT - Auto-Movie-Thumbnailer, it's very easy to use and it's fast at creating thumbs of vids. It supports mp4 which many other thumbnailers don't.