I'm having the exact same issue. This is what I get in the command line when after I get passed the the Playstation Network screen. I gather there's an issue with the opening movie file, but I struggle to make sense of this. This started after I updated Vita 3k to 0.2.0.
Are you getting the same?
[17:08:01.559] |T| [open_file]: sceIoOpen: Opening file app0:/data/movie/P4CTOP3.mp4 (ux0:/app/PCSE00120/data/movie/P4CTOP3.mp4), fd: 0x3C
[17:08:01.595] |E| [mutex_lock_impl:

lambda_3>::operator ()]: sceKernelTryLockLwMutex returned SCE_KERNEL_ERROR_LW_MUTEX_FAILED_TO_OWN (0x80028185)
[17:08:02.918] |W| [export_sceVideodecQueryMemSize:

lambda_1>::operator ()]: Stubbed sceVideodecQueryMemSize import called. (fake size)
[17:08:02.921] |W| [export_sceCodecEngineAllocMemoryFromUnmapMemBlock:

lambda_1>::operator ()]: Stubbed sceCodecEngineAllocMemoryFromUnmapMemBlock import called. (fake vaddr)
[17:08:02.928] |W| [export_sceAudiodecGetContextSize:

lambda_1>::operator ()]: Stubbed sceAudiodecGetContextSize import called. (fake size)
[17:08:03.009] |E| [export_sceAudioOutOpenPort:

lambda_2>::operator ()]: sceAudioOutOpenPort returned SCE_AUDIO_OUT_ERROR_INVALID_SAMPLE_FREQ (0x80260008)
[17:08:03.010] |E| [export_sceAudioOutOutput:

lambda_1>::operator ()]: sceAudioOutOutput returned SCE_AUDIO_OUT_ERROR_INVALID_PORT (0x80260003)
[17:08:05.031] |I| [renderer::vulkan::PipelineCache::save_pipeline_cache]: Saving pipeline cache...
[17:08:05.033] |I| [renderer::vulkan::PipelineCache::save_pipeline_cache]: Pipeline cache saved