When sharing video my windows phone automatically compress it. The video quality is much worse then original.
- Does windows phone allows to turn off compressing video while sharing?
- Can I force WP to share video only through WIFI connection?
If you're referring to the "share..." menu for 3rd party applications, it's completely up to the individual application if it'll compress the data prior to it being shared or not.
However, if you're referring to the automatic upload to SkyDrive, you can configure it from settings. See the following screenshots:
("Best quality" is uncompressed)
I've had good results by uploading to SkyDrive, then sharing from within that app.
From the Camera app --
This works well and the video quality is excellent, but uploading can take some time.