I downloaded a movie from the Internet, he does not play (no sound or image)

To play audio and video files in the operating system must be equipped with special software - codecs. If the same audio file does not play, or when playing a movie no picture or sound, and possibly both, it means you need a codec for that file type.
One of the best collections of codecs is the K-Lite Codec Pack, it contains a large Number of different codecs. Currently, the collection includes:
Media Player files:

    - Media Player Classic [version 6.4.9.1 rev. 49]
FFDShow:

    - FFDShow [revision 1937]
    - Extra plugins
    - FFDShow VFW interface
DirectShow video filters:

    - XviD [version 1.2 build 2008-01-10]
    - DivX [version 6.8.2.6]
    - On2 VP6 [version 6.4.2.0]
    - On2 VP7 [version 7.0.10.0]
    - MPEG-1 / MPEG-2 (Cyberlink) [version 8.1.0.1513]
    - MPEG-1 / MPEG-2 (DScaler5) [version 0.0.8.0]
    - MPEG-1 / MPEG-2 (Gabest) [version 1.0.0.3]
    - MPEG-1 / MPEG-2 (MainConcept) [version 1.0.0.78]
    - MPEG-1 / MPEG-2 (Ligos) [version 4.0.0.77]
DirectShow audio decoding filters:

    - AC3/DTS/LPCM/MP1/MP2 (AC3Filter) [version 1.46]
    - Vorbis (CoreVorbis) [version 1.1.0.79]
    - AAC (CoreAAC) [version 1.2.0.575]
DirectShow audio parsers:

    - MusePack (MONOGRAM) [version 0.9.1.2 | 0.3.1.2]
    - WavPack (CoreWavPack) [version 1.1.1]
    - FLAC (madFLAC) [version 1.8]
    - Monkey's Audio (DCoder) [version 1.0]
    - OptimFROG (RadLight) [version 1.0.0.1]
    - DC-Bass Source [version 1.1.0.0]
    - AC3/DTS Source (AC3File) [version 0.5b]
    - AMR (MONOGRAM) [version 0.9.0.1]
DirectShow source filters:

    - AVI splitter (Gabest) [version 1.0.0.9]
    - AVI splitter (Haali Media Splitter) [version 1.8.122.18]
    - MP4 splitter (Haali Media Splitter) [version 1.8.122.18]
    - MP4 splitter (Gabest) [version 1.0.0.4]
    - Matroska splitter (Haali Media Splitter) [version 1.8.122.18]
    - Matroska splitter (Gabest) [version 1.0.3.0]
    - Ogg splitter (Haali Media Splitter) [version 1.8.122.18]
    - Ogg splitter (Gabest) [version 1.0.0.1]
    - MPEG PS / TS splitter (Gabest) [version 1.0.0.4]
    - MPEG PS / TS splitter (Haali Media Splitter) [version 1.8.122.18]
    - FLV splitter (Gabest) [version 1.0.0.4]
    - CDDA Reader (Gabest) [version 1.0.0.2]
    - CDXA Reader (Gabest) [version 1.0.0.2]
DirectShow subtitle filter:

    - DirectVobSub (a.k.a. VSFilter) [version 2.38]
Other filters:

    - Haali Video Renderer [version 1.8.122.18]
VFW video codecs:

    - XviD [version 1.2.0-dev build 2007-07-25]
    - DivX Pro [version 6.8.2.6]
    - X264 [revision 721bm]
    - On2 VP6 [version 6.4.2.0]
    - On2 VP7 [version 7.0.10.0]
    - Intel Indeo 4 [version 4.51.16.2]
    - Intel Indeo 5 [version 5.2562.15.54]
    - Intel I.263 [version 2.55.1.16]
    - Huffyuv [version 2.1.1 CCE Patch 0.2.5]
    - I420 (Helix) [version 1.2]
    - YV12 (Helix) [version 1.2]
ACM audio codecs:

    - MP3 (LAME) [version 3.97]
    - AC3ACM [version 1.4]
    - Vorbis [version 0.0.3.6]
    - DivX ;) Audio [version 4.2.0.0]
Useful program:

    - Codec Tweak Tool [version 2.2.4]
    - GSpot Codec Information Appliance [version 2.70a]
    - MediaInfo 0.7.6.3
    - VobSubStrip [version 0.11]
    - GraphEdit [build 061102]
    - Haali Muxer [version 1.8.122.18]
    - AVI Fixed [version 2.0b1]
    - FourCC Changer
    - Bitrate Calculator