  The amount of audio-visual information has increased dramatically with the
advent of High Speed Internet. Furthermore, technological advances in recent
years in the field of information technology, have simplified the use of video
data in various fields by the general public. This made it possible to store
large collections of video documents into computer systems. To enable efficient
use of these collections, it is necessary to develop tools to facilitate access
to these documents and handling them. In this paper we propose a method for
indexing and retrieval of video sequences in a video database of large
dimension, based on a weighting technique to calculate the degree of membership
of a concept in a video also a structuring of the data of the audio-visual
(context / concept / video). Finally, we decided to create a search system,
offering in addition to the usual commands, different types of access to the
system, depending on the disability of the person. Indeed, the application
consists of a search system but offers access to commands through voice or
gestures. Our contribution at the experimental level consists with the
implementation of prototype. We integrated the techniques proposed in system to
evaluate it contributions in terms of effectiveness and precision.
