Your clock is not set properly. So you either need to set network clock in your router or connect the box to a DVB-source
Thank you,with Mytube it's all right,but archivczsk plugin no.Author write:"The existing functioning lines redirected from HTTP to HTTPS protocol, so it must be verified certificate,secure connection. Older image (with an older version of python / openssl) have problems if you want to download via the https protocol & error of SSL certificates."