[ashlar]

I can access XBMC logs now, but in any case I just copy you the lines I was referring to. Doing what you suggested didn't work, with cache disabled (and the cache directory completely cleared beforehand) it didn't even arrive at the quality prompt. Here are the lines:

PHP Code:

658. 20:12:23 T:30508 WARNING: XFILE::CFileFactory::CreateLoader - unsupported protocol(plugin) in plugin://plugin.video.gdrive-testing/?mode=video&instance=gdrive1&folder=0ALqc3r0JSiXEUk9PVA&filename=1qTrssusM7rnkpuYxdKWJM4gyVY09NWG_yNCJwo_mj4c&title=XBMC-gdrive&content_type=video
659. 20:12:23 T:30508   ERROR: XFILE::CFileCache::Open - failed to open source <plugin://plugin.video.gdrive-testing/?mode=video&instance=gdrive1&folder=0ALqc3r0JSiXEUk9PVA&filename=1qTrssusM7rnkpuYxdKWJM4gyVY09NWG_yNCJwo_mj4c&title=XBMC-gdrive&content_type=video>

860. 20:12:40 T:30700   ERROR: CCurlFile::Stat - Failed: HTTP response code said error(22) for https://www.googleapis.com/drive/v2/files/0B7qc3r0JSiXENG5EZ0VmQmZuZkU?alt=media
861. 20:12:40 T:30700   DEBUG: CCurlFile::GetMimeType - https://www.googleapis.com/drive/v2/files/0B7qc3r0JSiXENG5EZ0VmQmZuZkU?alt=media -> failed
862. 20:12:40 T:30700   DEBUG: CFileCache::Open - opening <drive/v2/files/0B7qc3r0JSiXENG5EZ0VmQmZuZkU> using cache
863. 20:12:40 T:30700   DEBUG: CurlFile::Open(0ADE1650) https://www.googleapis.com/drive/v2/files/0B7qc3r0JSiXENG5EZ0VmQmZuZkU?alt=media
864. 20:12:40 T:30700   ERROR: CCurlFile::FillBuffer - Failed: HTTP returned error 403
865. 20:12:40 T:30700   ERROR: CCurlFile::Open failed with code 403 for https://www.googleapis.com/drive/v2/files/0B7qc3r0JSiXENG5EZ0VmQmZuZkU?alt=media
866. 20:12:40 T:30700   ERROR: XFILE::CFileCache::Open - failed to open source <https://www.googleapis.com/drive/v2/files/0B7qc3r0JSiXENG5EZ0VmQmZuZkU?alt=media>