I was trying to download a couple of iPlayer files. I can post the URLs if it helps. Downloaded one ok and it crashed on the second (using the QTube download queue), which repeated the second try. I have just retried the same two files with QTube again but this time it worked. So maybe there was a one-off glitch, I will try a few more times tomorrow.
But iPlayer itself now crashes immediately, never gets to the splash screen, let alone the home page, so no URL etc relevant there. This has repeated a fair number of times and is still failing every attempt. I'm starting it from the Custom Portal, but the same happens if started via the Humax Portal. I'm guessing from what you say there is no connection between the iPlayer App and QTube at all? So maybe I have a near-EOL box, though nothing else seems wrong. If nobody else is reporting a similar problem that's probably the answer and I will have to investigate a well-known auction site to see if I can get a replacement, the box and custom firmware is just too useful to do without. Has lasted around 11 years and given good service till now.
By "Crash" I mean the box black-screens, with the LED display saying "Crash - please wait" and the box then restarts. I can't see anything interesting in the log files, though the activity.log file shows the reason as "System booted (unknown 4)" if that is meaningful.