Video quality and marketplace links

[DznDani]

Idk if you can tweak this but, when i downloaded some videos from a user using his username URL, it worked, but when i use the link from a certain post (when the URL has marketplace in it), it doesn't work.

Also, when i downloaded the videos, all of them are in 640x360, it will be useful if we can download at certain quality or just automatically at the best possible.