i have made additional tests with Video playback on my 101 platinum.
I have tried out to playback Videos from the sd-card with 1080i, 1080p and
720p in h.264 in a ts- and a mp4-Container to avoid streaming network problems.
Only the 720p-Video playback works but sometimes there is a very short stuttering.
The playback is acceptable.
The 1080-Videos doesnt work. I have tested different players (preinstalled player with Codecs, mx-player, vlc).
The results are slighly different (Time until aborts, Kind of picture damage)
Multiple phone calls with the archos support hotline could not resolve the problems.
Acording to the hint that the Video playback with the 101 g9 turbo works well there were no explanation,
because the performance of 101 platinum is higher than the 101 g9 turbo.
A date of a new Firmware release is unknown.