The download speed will be dropped if the camera is recording, so it require to stop recording first.
In 5G Wi-Fi mode, the download speed is up to 3MB/s, it is much much better than most of the dash cam on the market that only support 2.4G Wi-Fi.
While Wi-Fi enabled, the camera can only be controlled via Wi-Fi.
About the freezing issue, may I know what settings and memory card do you use?
We don't recommend to keep the Wi-Fi on while the camera in parking mode recording.
The latest firmware support lock the video and take video snapshot at same time.
It can not turn off video lock by remote button, you can unlock the video in the camera while playback.
It will lock the video immediately.
We suggest you share video to us by google drive and dropbox.