[sekac]

Here is this test plugin, I know it works if you plant the bomb and die with no teammates left alive and there is at least 1 ct left alive. You must be in first person camera too. Hopefully it helps someone.
Edited this plugin: Link

PHP Code:

#include <amxmodx>
#include <engine>
#include <fakemeta>

new PLUGIN[] = "Spectator Camera";
new VERSION[] = "0.1 Beta";
new AUTHOR[] = "Multiply";

new MODEL[] = "models/player/vip/vip.mdl";

new bool:bombPlanted;
new giCameraEntity;
new bool:gbCameraActive[33];

new bool:specEnabledT;
new bool:specEnabledCT;

new const g_szBombModel[] = "models/w_c4.mdl"

new Float:g_fBombOrigin[3]

public plugin_init() {
    register_plugin(PLUGIN, VERSION, AUTHOR);

    register_clcmd("camera",     "CameraToggle");
    register_clcmd("+camera",     "CameraActivate");
    register_clcmd("-camera",     "CameraDeactivate");
    
    register_forward(FM_StartFrame, "fwdServerFrame");
    
    register_logevent("logevent_PlantedTheBomb", 3, "2=Planted_The_Bomb")
    
    register_event("DeathMsg", "EventDeath", "a")
    
    CameraInit();
}

public plugin_precache()
    precache_model(MODEL);

public juhp_eventPlayerSpawn(iPlayerId) {
    CameraDeactivate(iPlayerId);
}

public client_disconnect(iPlayerId) {
    CameraDeactivate(iPlayerId);
    countAlivePlayers(iPlayerId);
}
    
public CameraInit() {
    giCameraEntity = engfunc(EngFunc_CreateNamedEntity, engfunc(EngFunc_AllocString, "info_target"));     // Create Camera Entity
    set_pev(giCameraEntity,     pev_classname,         "Multiply_Camera");                 // Give the Camera a name
    set_pev(giCameraEntity,     pev_solid,         SOLID_NOT);                    // Make the Camera semiclip
    engfunc(EngFunc_SetModel,     giCameraEntity,     MODEL);                     // Set Camera Model (Needed, for EngFunc_SetView to work properly)
    set_pev(giCameraEntity,     pev_movetype,         MOVETYPE_FLY);                    // Stop the Camera from dropping on the ground
    set_pev(giCameraEntity,     pev_health,        1.0);                        // Set Camera health to 1
    set_pev(giCameraEntity,     pev_takedamage,        0.0);                        // Make Camera invincible
    set_pev(giCameraEntity,     pev_rendermode,     5);                        // Fix rendermode
    set_pev(giCameraEntity,     pev_renderamt,         0.0);                        // Make it less visable
    set_pev(giCameraEntity,     pev_angles,         Float:{0.0, 180.0, 0.0});            // Test using angles
    CameraSetOrigin(Float:{0.0, 0.0, 0.0});                                    // Place Camera in the middle of the map
}


public CameraSetOrigin(Float:fOrigin[3]) {
    new Float:fMins[3], Float:fMaxs[3];
    pev(giCameraEntity, pev_mins, fMins);
    pev(giCameraEntity, pev_maxs, fMaxs);
    engfunc(EngFunc_SetSize, giCameraEntity, fMins, fMaxs);

    return engfunc(EngFunc_SetOrigin, giCameraEntity, fOrigin);
}

public CameraToggle(iPlayerId) {
    switch (gbCameraActive[iPlayerId]) {
        case true:     CameraDeactivate(iPlayerId);
        case false:     CameraActivate(iPlayerId);
    }
    return PLUGIN_HANDLED;
}
public CameraActivate(iPlayerId) {
    if (!is_user_alive(iPlayerId)) {
        engfunc(EngFunc_SetView, iPlayerId, giCameraEntity);
        gbCameraActive[iPlayerId] = true;
    }
    
    return PLUGIN_HANDLED;
}

public CameraDeactivate(iPlayerId) {
    engfunc(EngFunc_SetView, iPlayerId, iPlayerId);
    gbCameraActive[iPlayerId] = false;
    return PLUGIN_HANDLED;
}

public logevent_PlantedTheBomb()
{
    new iC4 = -1
    if((iC4 = find_ent_by_model(iC4, "grenade", g_szBombModel))) 
    {  
        pev(iC4, pev_origin, g_fBombOrigin)
        CameraSetOrigin(g_fBombOrigin)
        bombPlanted = true
    }
}

public countAlivePlayers(id) {
    if(!bombPlanted) return
    new iPlayers[32], iTAlive, iCTAlive; 
    get_players(iPlayers, iTAlive, "ae", "TERRORIST"); 
    get_players(iPlayers, iCTAlive, "ae", "CT"); 
    
    specEnabledT = !clamp(iTAlive, 0, 1)
    specEnabledCT = !clamp(iCTAlive, 0, 1)

    for(new i = 0; i < 32; i++)
        if(get_user_team(i) == 1 && specEnabledT || get_user_team(i) == 2 && specEnabledCT)
            set_task(5.0, "CameraActivate", i)

}

public EventDeath() {
    new id = read_data(2)
    countAlivePlayers(id)
}