Flashing stock firmware from cwm or directly from mobile?

[emoji111] Hi everyone this is my first post here on XDA. So i flashed a Emotion UI on my doodle 3. I got bored with it and even YouTube doesn't works on it. So i wanted to revert back to stock ROM and modify it via Xposed. I didn't make a backup before flashing the ROM. So i downloaded a firmware for it and tried flashing it with SP flash tools. It got stuck at "Download DA 100%" at a full Red bar.( I chose the download option). It is in the form of a folder so can I flash it in my mobile itself? If yes, how? Thanks in Advance[emoji3]
TL;DR- Can i revert back to stock rom from a custom one with a firmware in a folder directly from mobile?

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