Remote Download video footage

<p>1.Search Footage from Terminal Device (SD card or HD) <img src="https://www.showdoc.com.cn/server/api/attachment/visitfile/sign/431d098fea7b327f1e07f807b2a98ca7" alt="" /></p> <p>2.Choose target channel and time interval <img src="https://www.showdoc.com.cn/server/api/attachment/visitfile/sign/1f3a6d60e072550a06c15b481bc8bd9f" alt="" /></p>