Horde3D

- Use
  dynTex = ::h3dCreateTexture("$DYN_TEXTURE", videoWidth, videoHeight, TEX_BGRA8, H3DResFlags::NoTexMipmaps);
  to create a new texture - be careful to chose a name which is not yet occupied!
  Use TEX_BGRA8 as format - your video needs to be converted in this format or you have to patch the renderer to support BGR only
- Find the material resource you want to apply the video texture to
  matRes = ::h3dFindResource(H3DResTypes::Material, matName);
- Find the sampler index within the material
  int samplerIndex = h3dFindResElem(matRes, H3DMatRes::SamplerElem, H3DMatRes::SampNameStr, samplerName); // samplerName sth like "albedoMap"
- Apply the dynTex to the material
  h3dSetResParamI(matRes, H3DMatRes::SamplerElem, samplerIndex, H3DMatRes::SampTexResI, dynTex);
- You do this only once.

Then after getting a video frame from ffmpeg, upload it to horde (which will upload it to GL)
void *mappedData = h3dMapResStream(dynTex, H3DTexRes::ImageElem, i*countsPerSlice+mip, H3DTexRes::ImgPixelStream, false, true );
// (i, countsPerSlice and mip are only relevant if you have a mipmapped and/or cube texture, otherwise just set it to 0)
// copy image data over to horde's internal buffer
memcpy(mappedData, ffmpegVideoFrame, textureSize); // with texture size being videoWidth*videoHeight*4 in case of BGRA8
// tell horde to upload data to GL
h3dUnmapResStream(dynTex);