LeftClick on an element in BookTimeLine set time at begining of the element.
<UserControl
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:Input="clr-namespace:SLExtensions.Input;assembly=SLExtensions"
mc:Ignorable="d"
x:Class="Iri.Modernisation.Controls.View.WebCamControl" Height="243" Width="223">
<Grid x:Name="LayoutRoot">
<StackPanel x:Name="VideoViewerControlPanel" Orientation="Horizontal" Margin="8,0,8,8" VerticalAlignment="Bottom">
<Button x:Name="VideoControlLanch" Input:CommandService.Command="CamRecordLanch" Width="43" Content="^" />
<Button x:Name="VideoControlRecord" Input:CommandService.Command="CamRecordBegin" Width="43" Content="O" />
<Button x:Name="VideoControlStop" Input:CommandService.Command="CamRecordEnd" Width="43" Content="[]" />
<Button x:Name="VideoControlClose" Input:CommandService.Command="CamRecordStop" Width="25" Content="X"/>
</StackPanel>
<Rectangle x:Name="VideoScreen" Margin="8,8,5,34" Stroke="Black">
<Rectangle.Fill>
<VideoBrush x:Name="VideoScreenBrush"/>
</Rectangle.Fill>
</Rectangle>
</Grid>
</UserControl>