Although the standards for egypt films have been raised much by mobdeli's 'Egyptian Holiday', Secrets of the Lost Tomb can compete with it.
The voice acting was the best part of the film, the characters had the voices they needed. The Set design was good, though basic. The Sfinx was really great though. The cinematography was basic and had only a few interesting angles (0.51 - 01.00; 09.52 - 09.55).
The story itself is good enough and should keep one interested, though I there were some problems with your way of storytelling. The film consists completely of dialogue and thus is the story completely dialogue-driven. This is annoying in live-action, even more in animation. The scenes consist of the same scheme: characters arrive - characters talk about what they discovered and are going to do - characters go to the next location. The scenes where they were flying to Egypt and riding the camels were a good exception from this pattern. Try to variate in the scheme. Also use more action sequencies and try to visualize the story rather than to tell it trough dialogue.
Overall it kept me watching the whole 10 minutes and I enjoyed it but would have liked less dialogue and more action.